Mercedes Secondary Air Pump Problem

If your Mercedes sounds like a a jet engine in the morning or a circular saw when you start the engine you probably have a problem with the Secondary Air pump - It might be a free repair or very expensive - Mark shows you the problem, the tools needed to fix it and how you might get it fixed for free under a little known warranty

[@MK-xn6qx]

When I saw jean jacket & white hair, I thought it was Jay Leno..

[@or9826]

Amazing video! Very detailed. Not just replace a part, but identify the problem and fix the part. Great work!

[@carquestions]

Thanks! 👍 Cheers from Canada!

[@fgang781]

Wow my car is having the exact same issue! And every mechanic says the pump is about to go! Why cant everyone be like you honest!

[@BobJones-ib4xh]

2007 C230 Sport/ I've had the car for 15 years now/ I usually hear this pump for the first 10-20 seconds during a cold start / yesterday morning the sound stuck around for what seemed a minute or two. After I drove off and was sitting at a traffic light the car felt like it wanted to flame out. Not sure if the two are related. I checked the hoses to make sure none were lose or disconnected and the car has not repeated the same minute long whine/ idles at about 300 RPM with no noticeable sign that the engine wants to flame out. I suspect the long whine may be this one component/ close flame out may be something entirely separate (new coil packs and plugs went in last year). Hoping to keep the car running another 3-5 years if possible so I hope its not anything major. Thanks for the content.

[@carquestions]

Sounds like 2 problems - get codes - also disconnect power to blower if you suspect its the source of the noise Bob - let me know what you find - Cheers from Canada!

[@chrisxiao5471]

Very encouraging video. I went homedepot to get T30 and some tools. In 30 min I took out the old one. Now need to find a replacement part on amazon which is painful to decide which to buy

[@carquestions]

Get the one with the best reviews Chris - Cheers from Canada!

[@airsoftalamo3469]

Mine was this bad I have a c280 with 84,000 miles on the clock. I bought new one on ebay for £50 took 30 minutes install and sounds so quiet now, instead of waking neighbors with my old jet engine one. Mercedes dealer quoted me £674.99 + Vat for part alone with labor I bet it be £1000 so for £50 I'm happy 😂

[@carquestions]

Same price hear in Canada - Well done AA - Cheers!

[@fixmyhog]

Thanks for the great video. I had the same issue on my 2008 C300. Mercedes wanted $ 1,200.00 to fix the issue. I found the part online for $ 143.96 at Pelican Parts and on eBay for $ 167.95. Mercedes Benz part # MB000-140-51-85 is listed for $ 875.00 from the dealer. Wow! The dealer does not provide you with a jar of Vasoline if you purchase from them.

[@carquestions]

ah - that's one way of putting it

[@shiroeli9936]

Can you imagine a goddamn repair shop in my town asked me for $2800 to repair this? My car has the engine light on but it does not have any horrible noise. Thanks to your video and I decided to disregard it until it sounds like a jet engine. :)

[@shiroeli9936]

At first, I mistook i2800 as 280 and thought it was a little bit expensive. Then, the manager told me it was $2800. F**K OFF!!

[@demer19374]

just changed mine and what an awesome video to show the bolts needed to remove. 1/2 hour is all it took to put in a new one and then repair the old one for next time it fails. Thanks again. My labor plus 130 bucks for the part saved me a bundle!

[@carquestions]

That's what I want to hear - excellent

[@jamzempire]

Code P0410 sent me here as well, i have a 2010 c300. My car does sound like a get engine upon startup so i guess i will be changing a pump!

[@albertkim9544]

Excellent video!! Based on lessons learned from your video, I tapped outside of the pump with a wood marlet, then the noise disappeared. It was a quick 10 mins job and saved enough money.

[@albertkim9544]

I realized that it won't be the permanent fix; however, there's no such thing as a permanent fix.

[@uzzle21]

should i change the relay first before i change the smog pump? just to see . i got a engine light for both

[@carquestions]

Yes - very good idea

[@joeybonilla0416]

Do you know the location of the relay I’ve been searching for a while can’t find g

[@bmt9927]

Just replaced mine. 2008 ML 350. $70.00 on Amazon.

[@xabizar]

Part number?

[@tommytinker]

It comes apart very easy, blow out dust and put some lubricant on bearings and noise is gone!

[@johns.7609]

Damn, when you said sounds like a jet engine you weren't kidding.

[@ch-vs3fw]

Well done! Thank you! Much appreciated!!

[@carquestions]

Anytime - cheers!

[@erikgillisostrom6109]

Soo much space between radiator and engine compared to the V8 ;.)

[@carquestions]

For V8 and longer hood line look - Cheers from Canada Erik!

[@dcomputers]

I thought Jay Leno walked into the video

[@carquestions]

I'm better looking - cheers!

[@EmilianoG]

Thank you so much for your video its very detailed and helpful.

[@DrMarvinLara]

I had the same problem with my 2012 C250. But two months ago when the engine light came on, it didn't sound loud like that. Now it does sound like it a bit. And two days in a row, when I started the car cold, it struggled and I couldn't accelerate fast at all and the engine light blinked a few times and then came on. So I let the car idle a for a few minutes to listen for anything. Nothing more. So i turned off the car and 5mins later when I started the car, the engline light was off and it was running like normal again. I got the p0410 code. This has happened 2 days in a row. On the third day, the engine light just came on, but the car didn't struggle. Any idea what it could be?

[@carquestions]

It's the secondary air pump causing the problem - to test your theory just disconnect it and see what it does

[@rhinolipsince07usamfgedori93]

Bad Engine Temp Sensor can cause the Engine Cooling fan to default to an "ALWAYS ON HIGH" Mode whenever the car is started.

[@RothBeyondTheGrave]

My sister had that bad sensor in her w203 230. Replaced & sounds normal again/fan only comes on when it should

[@MechAdventures]

Awesome video, pump can be also rebuild its not actually difficult, I've made video on how to.

[@shwndh]

It will be making the same noise in a week. The bearings are shot and the carbon brushes probably need to be replaced. You went that far into the motor you should have tried to take the shaft out to get to the bearings. This was a band aid fix. Good tear down though.

[@frankiesun09]

This dummy should have replaced the bearing(s) then it would last. This guy's middle name is BandAid... LOL

[@jortiz7234]

RE/MAX Northwest and shwndh any human that criticizes another human for making a video helping out others at no cost should really question their purpose not only here but in this planet as it says a lot about the way your mind operates and the frustration of unfulfilled goals. unaddressed psychological issues have a language of their own and you guys are speaking it loud and clear. possibly a lack of unity of parents and family, not enough attention by loved ones between the ages 5-13, only child busy parents or more than one child and being the second favorite or not a favorite at all. and many other issues that can be individually addressed. Point being you wont you get the proper sleep (rest) at night until you realize the world does not owe you anything but you do owe it to yourself the chance to live a fulfilled Human Life, one that carries positive thoughts and words of affirmation as what you say to others is simply an echo of unconscious thoughts about yourself. You nor this planet will ever benefit from negative reinforcement. "Help me Help you"

[@Mikgwerd]

Even if you replace the part new, it will still make the same noise 5-6 months later. It's just a flawed bad quality part from Bosch that wont be fixed since dealers make a killing off it ($1127)

[@davidjacobs8558]

@@Mikgwerd pretty much all V6 and V8 Mercedes engines have this pump. and most of them don't break down every 5-6 month. so you should look into why your pump breaks down after 5-6 month.

[@Mikgwerd]

@@davidjacobs8558 ok then. Tell everyone who commented on this video about their SAP the same thing, that they must all be overlooking something.

[@michaelhiggins7365]

Great video and is worth a try, however, I saw brand new aftermarket pumps on Ebay for $84 including shipping. Considering the time spent to do this, it may be more worthwhile to replace with new for well under $100 US.

[@carquestions]

Give the cheap one a try - the original one was no good why try them again?

[@eyeorewolf]

When a part costs $700 and you can find it on eBay for under $100 I'd be a bit suspicious of quality however the pump is little more than a DC version of a two stage shop vac blower and you can buy an entire shop vac for under $100 so who knows. My policy on eBay is always "buyer beware" but there are good products on there at greatly reduced prices from OEM. The disassembly process didn't look that time consuming or complicated and even at $100 the two hours it probably took to disassemble and reassemble it would equate to $50 per hour, I used to make that kind of money and even then I favored DIY wherever possible and put the money in the bank, I guess that's why I retired at 53 with all my toys and it's play time. The only step I'm going to try to add to this process is attempting to locate and replace the brushes because the black dust he blew out of the unit was brush material so I'm not sure how long his customer's pump will remain quiet if the brushes are worn below spec., in any event awesome video.

[@BrettWyrick]

Hey Mark - I'm getting P0410 code on my 2008 C300. The thing is, it doesn't sound like a circular saw or anything in the morning. I can hear the Secondary Air Pump (I think) running when I turn it on from a cold start. Any idea on what else it could be?

[@carquestions]

Let the problem develop further - it's the SAP most likely

[@BrettWyrick]

carquestions Thanks for the reply. I've had this p0140 code for four years - if something was going to break on it, shouldn't it have broke by now?

[@eyeorewolf]

Thanks for this video, my secondary air pump is making a similar noise, the pump looks like a glorified two stage shop vac blower. The black dust you blew off was obviously wear material from the brushes so I'm not sure if it was addition of grease to the bearings or the removal of the excess dust that actually got rid of the sound. I will be removing and disassembling my pump and will also try to see if I can't replace the brushes as part of the cleanup and lube process. Thanks again for the video it's a good guide even for my 05 SLK 55 AMG.

[@carquestions]

Kurt - thanks and let me know how it works out please

[@eyeorewolf]

It's on my list of many projects but I will try to remember to also post the part number on the brushes if I am able to find them and send you some pictures or video of the replacement process, I'm speaking from pure ignorance at this point because I have not yet seen the motor first hand to see if it can be done.

[@indybop]

Exact same problem with my 2010 GLK. Thanks for the video and excellent walk through. I may just unplug mine and plug it back in come e test time.

[@carquestions]

Good idea Jason - car runs fine without it

[@erikko6523]

Yo bro please tell me if it’s my problem 2003 Cadillac deville check engine light on but runs like a charm code P0412 Is it possible my pump could be on but not blowing significantly? So I would still need one ?

[@carquestions]

Yes Erikk that could be happening - change it out and let me know how it works out for you - çheers from Canada

[@ermias01]

Just finished working on my 2011 C300 - what an awesome instructional video. Thank you sir.

[@carquestions]

Glad it helped Ermias

[@CaptBill1111]

Best DIY video ever. No BS, no rambling on, no over explaining, just the straight forward directions, and quickly, perfect!

[@carquestions]

Glad you like it Cap - Cheers from Canada!

[@hurexorderdesk6768]

Thanks for the info , I have a GLK350 Benz and I have the same Noise . . . disassembled the air pump and greased up the bearings .... issue solved

[@carquestions]

Glad it helped and thanks for the tip Hurex - Cheers from Canada!

[@davidn9571]

Did you get and error code before the fix?

[@metarexonthebeat5245]

Hello, mine does not sound that loud or annoying. But in the morning it is much louder and becomes faint during regular use in the day. Will have to check this.

[@carquestions]

usually won't come on again during the day - just the first thing after a long period

[@ewong1]

It is not dust, those particles came from motor carbon brushes.

[@joseluiscabada31]

I own a 2005 Crossfire and a check engine light popped up and it’s the smog pump but every time I look it up it brings me to Mercedes videos is it the same part for both?

[@carquestions]

Yep - your car is 99.9% mercedes so get the mercedes pump -

[@neils5819]

I like how you said you didn't take the "5th" bolt off of the bracket lol. It's because there wasn't one 🤣.

[@WaveProject]

I got my secondary air injection pump and relay replaced and P0410 and the check engine light is on. Do you think it could be the new part I bought it on amazon. We checked it and it worked. So what is going on? Thanks for the help.

[@carquestions]

They sometimes do that - disconnect battery for 20 minutes then try again otherwise try another replacement

[@derekehardy6265]

Is your check engine light on still?

[@moonyachti]

Don't you have tondrive for a certain amount of miles for it too clear?

[@WaveProject]

LETS PLAY I did but nothing.

[@moonyachti]

@@WaveProject my check engine light is still on too and i need it to clear so i can pass smog they said it could be not enough volts and could be due to some technical wire issue not sure if its ground or not but im going to get it fixed for $50 I'll update this once i get it done and find out what it is👍

[@youngblood8612]

I have the same problem on my c350 its sounds like airplane engine but now its totally not working give me engine light on my dash and i drove for week with a broken SAP now when i start the car its like shaking a bit idk if because of the SAP i went to the mercedes dealer for the price of SAP and guess what 1,350$ + the relay 40$ i order in FCP Euro for 215$ BOSCH BRAND all i have to do wait for my parts and install it and i will clean and lubricate the original one like you did to use in case the new one fail , thank you sir save me money for labor.

[@yokev_5611]

I’m having the same issue with my C350 (p0410) did you experience loss of power when you hit the gas? Does your shakes a little cold start? Also do you hear any funny grind when you hit the pedal?

[@yokev_5611]

@@PlaywithDaisy my Catalytic was clogged and I had to change my mass air flow sensor

[@kenwuvideo]

Thank you for this video. My SLK350(M272) has same problem and I ordered a new pump and relay. Tomorrow I will replace them and keep old pump after cleaning and checking. from Japan.

[@carquestions]

Great! let me know how i works out

[@kenwuvideo]

Look !!! I succeeded in repair of secondary air pump My blog : blogs.yahoo.co.jp/ken_wu/35154579.html

[@louisolazagasti4979]

Hello is it supposed to go on every time the car is cold

[@carquestions]

Yes 90% of the time

[@AsunderSoft]

A check engine light brought me here. I checked with a code reader and got P0410 secondary air injection system. Followed by another code 0814-00 Malfunction of secondary air injection at left bank of cylinders (function chain) (P0410). I visually inspected all connections and hoses and those seem to be OK. Mine does not make the noise the one in the video did. Any suggestions?

[@carquestions]

Change the pump - here's why - I changed one out a noisy one and a week later the code came back but the second SAP wasn't making noises like the original one - put in the third one and it has been fine ever since

[@ActionMotorsportsCA]

Pushes extra air into the cats to help them heat up faster. cat converters won’t begin to clean the hydrocarbons until they are hot.

[@sudilos1172]

I would have powered it once all the fans were removed but before removing the plastic motor covering.

[@dkguy8117]

I read that the 'relay' should be replaced at the same time, can anyone tell me where it is? Sorry Mark didn't address it, such a good video tho. $332.00 Bosch cad and $15.00cad for the relay.

[@carquestions]

If the pump runs at all - the relay must be working so no need to change it - if the pump doesn't run then yes change the relay

[@tonykari5124]

I've changed my secondary air pump 7 months ago and I've fixed few other things but I can't get my secondary air to get READY for the smog emissions test. Everything else exept EVAP & Secondary air wont get ready. Ita been 450 miles since... WTH

[@carquestions]

Need codes to know more Tony - Sec air pump only comes on when engine is dead cold - hard to say - would just be guessing without codes

[@tonykari5124]

@@carquestions no codes at all ... I had to jump my BMW 3 weeks ago because it was 18 outside and I didn't use it for 9 days or so. So now after driving 400 miles plus I can't get the secondary to get ready so I can pass the emissions test

[@ksajan16]

I am getting p0810 and p0814, same thing secondary pump not ready. I replaced the fuse, relay and pump is working. But this code shows up with not ready :(

[@Hautecakes90210]

I have a SL 550 and just paid the dealer $5000 for this repair. They told me if I didn't fix eventually the power steering and the car would drop almost to the ground. Feeling ripped off 😡

[@carquestions]

The secondary air pump has nothing whatsoever to do with the steering or suspension - It's an emission device only - sorry

[@jnineneuorpe8841]

Why not allow us to. listen before u took it off?

[@tyalbert5063]

Got you 4:03

[@timmychang1791]

Looks like a fan motor from any dry wet vac

[@briansun4587]

Really helpful. The best made video that can be found on this disassembly. thanks

[@carquestions]

Thanks Brian! Cheers!

[@nv1493]

Suggest using a fuse in the hot lead from the battery... " trying not to touch anything" is a good way to take out front SAM, or at least the mega fuses by the battery.

[@skydivedickson]

Hey @carquestions, thanks a ton for the video. After watching it I tested my Aux Air pump and it makes the same noise. Am I able to drive the car with this part removed until it is repaired? Thanks

[@frankiesun09]

Doesn't look like this KNOW-IT-ALL Replies to questions...

[@Mikgwerd]

Yes you can drive it. You will have CEL that'll stay on until you replace it however.

[@jcchen9461]

Hello Mark, I have a 2009 C300 with almost 70k miles. My pump sounds the same like the one in your video, also the engine light is on with code P0410. Is the noise pump the problem of this code? I would like to make sure before getting a new pump to replace. Because I saw other post with this code is not cause by the pump. Thanks for your great video.

[@carquestions]

Yes it was the same code I had - change the pump JC

[@jcchen9461]

Mark, I replaced with a new pump. It runs quite now. And I cleared the code. But after couple cold morning start, the Engine light come back on with the same code P0410. What you think I should check next?

[@uzzle21]

my pump doesn’t make any loud noise either , what should i do ? i just dont wanna waste any money on it .

[@carquestions]

Leave it then and disregard the warning - nothing will happen

[@uzzle21]

carquestions i got the warning off then it came right back on. so i went on head and ordered both parts so hopefully the check engine light will go off

[@generalmeng]

what is the function of the secondary Air pump?

[@carquestions]

It is strictly an emission device designed to blow / purge air in exhaust to help warm cats quicker -

[@fahadalbalushi5655]

Dear chief, huge thanks for your help i have one more question, i have 230 c-class gcc spec and as i found from the check engine the fault code was 0140 and theres no jet sound while running the engine in morning but the main issue while the car running on any hight way to rpm needle is not stable moving up and down and i feel the car is not normal , do you think the problem is from the same secondary air ? Please i need your help and support

[@fahadalbalushi5655]

High way*

[@carquestions]

Your problem doesn't sound like it is related to the air pump - so check the car for other computer codes asap - BTW could you do me a favour and check out my arthritis video and let me know what you think please - in need some feedback - cheers Fahad! - let me know how you make out. Reply ·

[@fahadalbalushi5655]

Thanks for response chief, today i went to one if the mechanic and he told me that my car have air leak from the throttle manifold and the air are not passing to the exhaust system, can you advise?

[@Pampilius86]

maybe this? kzbin.info/www/bejne/bmHZnqqhntWDl80

[@amyweisenburger]

I have the exact MB that he's working on in this video. In the past 3 months, my auto repair has replaced the secondary air pump 3xs. I have had it home for a week and it sounds like it is on the verge of failing again. I can tell by the smell, how it drives, and also the sound.They have checked the electrical, etc. Any thoughts or insight?

[@carquestions]

Sounds like you have parts replacers instead of a real mechanic - you are not paying them to guess or "try" and fix it otherwise you should "try" to pay them if you get what I mean - Sounds like you need a new mechanic Amy - good luck and Cheers from Canada!

[@johnhall4427]

Sounds like your guys arnt really replacing the pump with a new one. Clean and shine up the old unit and back in it goes! Theres not much to wonder about the seconday air injection pump. Just a electric motor that runs off 12 volts. Super easy to test with just 2 wires to a battery. If it fires up then your pump is good with no reason to burn up. Unless: but it does run off a relay in the fuse box. When you start your car the air pump should stay on for only about 20-30 seconds then shut off. The relays are known to go bad now and then and thats where the air pump stays on and wont shut off and the air pumps burn out and fry. Thats possibly what your smelling. Id bet your guys didnt replace the relay which is only about $15 bux. Relay is 10 second job like a fuse....just pop the old out and plug in the new one. Hard time believing your guys have put in 3 pumps that run on a 12 volt system and they all burn out. 🙄 😒 😬

[@carquestions]

Good advice John - Cheers!@@johnhall4427

[@avalon1995]

Good job on your diagnosis of that Bosh air pump and taking the time to identify the underlying cause of the noise it was making. Unfortunately, many in today's society won't take the time to do this kind of troubleshoothing and choose to take the easy way out by ordering a new part. The only disagreement I would have with you is replacing it (if need be) with a knockoff or less expensive part. If a customer can't afford paying for OE then they probably shouldn't own a Mercedes.

[@carquestions]

Lots of MB parts made in Romania etc - you are assuming OEM parts are the best built, longest lasting etc? My rule is if it lets you down try someone else's product

[@hoodhounds22]

Was the car experience in power loss??

[@Alex-jp3ek]

That’s exactly how I feel. I just bought my air injector pump, I’ve noticed less power with the car. So I’d say so yes

[@krzysztofkazmierczak6072]

What is a black liquid in the syringe?

[@carquestions]

light wheel bearing grease - multipurpose

[@EElegOfficial]

Hey, men excellent video, I just like to know what makes it go bad?

[@carquestions]

I'm looking into that now - video coming out shortly

[@EElegOfficial]

@@carquestions because in less than a 2 year i have to replace it again, the first time that I replace it, I use Borsh, now i brought an after market.

[@humbert1010]

hey great video but my car is a 1995 c280 benz and it does the same exact noise when started in the morning , would this be the case ? and where would it be located? thank you

[@carquestions]

If the noise only comes on for a minute and only when engine is cold then yes it most likely is the problem DJ - look for a similar looking electric motor under the hood

[@dorothykhamphoune2376]

DJC

[@johnseah957]

I had the same problem with my certified pre-owned 2010 E350. It was under the Mercedes CPO warranty, so the repair was covered. The issue that I ran into was that the secondary air pump failed every single year, so I had to replace them yearly for 3 years. The last time it failed, the warranty had just expired, but because it was replaced just under a year ago, it was still covered under the factory part warranty. This time the dealer looked into why the part failed every single year and they found that the secondary air shut off valves were leaking exhaust when closed. They ended up replacing both left and right bank secondary air injection shut off valves and that solved the problem with the air pump prematurely failing. Because my CPO warranty had already expired, the dealer got Mercedes to agree to cover the parts, but I had to pay for the labor.

[@carquestions]

Sorry to hear all the trouble John - their story about the cause sounds suspicious to me - but you"ll know for sure within a year or so - if they found the cause they should issue a TSB on it.

[@johnseah957]

@@carquestions That was what was listed on the repair order on what they replaced. I believe that was what fixed the problem, since it has been three years since that repair and the secondary air pump has not failed since. What ticks me off is they never bothered to look for what was causing the secondary air pump to fail prematurely when I had to replace it annually, not until my CPO warranty had expired.

[@glorycedeno9046]

Hello CQ! very fishy... I’ll bet that they’re hoping he sells/trade up the car by then🤦🏽‍♀️ SMH 🙇🏾‍♀️ This is why we’re all searching for answers here, because they’re constantly Overcharging for working on Mercedes Bz due to failure of inferiority of original parts from factory on MB that have under 150k mi ☹️ Ridiculous!! I had a 04 es330 /348k, I never had any issues!! I gave to my G’daughter 🤦🏽‍♀️ Now I have this MBz sitting w no power to the fuse or air pump, it’s unresponsive, No Codes!! Geez🙇🏾‍♀️ I’m going back to LEXUS and I’ll enjoy the ride with a piece of mind😴

[@khalidalhadhood7900]

Thanks it was a great help Thank you

[@carquestions]

Anytime Khalid - cheers!

[@johnharris7113]

Amazing video containing very intricate and informative detail. The combination of a great presentation and a knowledgeable instructor; I much appreciate. Thank you.

[@carquestions]

Glad you enjoyed it! John

[@andyoverall1951]

I just took mine apart and couldn't remember exactly how it went back together so thanks for your help.

[@carquestions]

Anytime Andy - I hear ya - cheers from Canada!

[@LiamRoberts00]

HelpI have a slight problem I have got the Mercedes straight six and the turbo is in the process of breaking, on the engine I have it has a pipe from a circular object with a black lid of sorts which seems to be coming off at the end by the cam, it breathes air, sorry my question is should the air have a residue of oil within it, has that led to the demises of my turbo or does it prolong the life of a turbo through lubrication.

[@carquestions]

It is a sign the turbo has failed - internal oil seals fail on turbos putting oil in places where only air should be

[@carquestions]

It isn't prolonging the life of the turbo - check your oil level and make sure you keep it full - the problem only gets worse

[@LiamRoberts00]

Thanks very much for your reply, last night I ordered a replacement turbo which should l arrive tomorrow, today I shall take off the failing turbo and see if I can find out what the device is that I have no name for that breaths spent air from the engine and see if that needs to be overhauled.

[@SKETNETAICALLS]

2004 S430 does the same cold in the morning then calms down later. You think that model has that part too?

[@uzzle21]

Angel Soliz yes it has it

[@gomugomunoo4590]

i have the same issue.. is it an urgent matter to fix ? does it have a lot of negative consequences on the engine or the exhaust if not fixed quick ? thank you very much for the video btw and thank you if u ever replay to my questions

[@carquestions]

You can drive as long as you like - shouldn't affect the running of the car at all - lots of messages maybe but just disregard until you can fix it - wouldn't let it ruin a trip

[@gomugomunoo4590]

nice thank you for the quick answer :) have a good day sir

[@11kdogg1024]

Mark if I replace that part will my check engine light shut off on it's own.

[@carquestions]

Yes it should

[@robertrobbins837]

Give me a car overheat if you're secondary air pump is not working not getting power

[@carquestions]

It shouldn't - something else going on

[@bnoakes4899]

Mines a 2011 GLK350, ECL Code PO410, no noise, engine runs great

[@carquestions]

Leave it and get more use out of it untill fails -Cheers from Canada!

[@Dnasty1]

This is the exact noise i'm having but not as loud. Lol I was describing it as an electronic space ship noise and everyone was looking at me crazy. What exactly does this part do. Is it urgent to replace?

[@carquestions]

No Adam not urgent normally - it feeds air into the exhaust for cleaner combustion on cold start ups

[@Dnasty1]

@@carquestions thanks. Great vid btw. I’ve noticed my air pump stays running at all times is this another symptom of failure? Also could it be related to the random misfire like feeling I’m getting from the engine? I don’t have any codes but I do notice occasional stutters that feel like misfire and when I watch the engine with the cover off it seems like it is hesitating quickly at times. Creates a minor vibration in cabin.

[@carquestions]

@@Dnasty1 secondary air pump is not to run constantly - only a few seconds on a cold start - if it is a misfire you'll get a code - if not it is something else not a misfire

[@williambrandt9254]

Thank you! As far as using third-party parts I've always felt differently unless you know the factory part is really short-lived. There is a lot of junk out there Mine just went out at 13 years and 83,000 miles Don't know how things are in Canada but I was shocked at the price disparity for the identical part The Mercedes dealer had one listed at $1100 and my second go to place called FCP Euro sold it for $198 which included a new factory relay and 40 amp fuse Same Bosch part number same unit But you're the pro with undoubtedly far more experience than me I'm just saying be careful with some of those parts out there

[@carquestions]

Here's my rule Will - if the part let me down why would I buy it again? - sure if it lasted 10 years

[@jbutler3694]

Where is the fuel pump and filter located on a SLK 350 05 model

[@carquestions]

Inside the fuel tank like most cars today

[@اسامهعبدالسلام-ي9غ]

What is the function of this pump and show the pump damage

[@carquestions]

it supplies air to the exhaust manifold - the damage is simply nad bearings - Cheers!

[@vanidedjuma1139]

My GLK 350 make same noise every first start in the morning

[@carquestions]

Sounds like the same problem Vanide - Cheers from Canada!

[@farajradaideh3637]

boss what is the main job for this pumbe please

[@aZnXpSyKo]

Thanks for the video! I'm having the same issue right now, what kind of grease did you use?

[@carquestions]

just motor oil

[@Fixboxter]

Hi. I have not 0410 code,but this pump not on/off last 4 monts cold engine (2-3 times maybe...),but I have other codes 0172 and 0175 and no one can't find problem,engine runs too rich,all sensors is ok.vacum leaks is ok,o2,maf... problem secondary air pump??

[@carquestions]

How many miles on it Fix? - could be a lazy 02 hard to say at this point

[@Fixboxter]

Mercedes w203 V6 2.5 L 140k miles,but this codes come again after every 30 miles. when engine is cold,car runs fine,codes come when engine tempreture 60 and up ! CEL come when car idle

[@microshiroku]

thanks bro, your vid saved me 300 dollar

[@carquestions]

Love that - Cheers from Canada!

[@gweenie6427]

Yes yes yes now I know the issue!

[@A.CAL96]

I switch my mine out thank you but I’m still getting the same code, do you know why it’s still showing a code

[@carquestions]

Cal - I've run into this before with aftermarket replacements - you can try getting a higher level scan tool to reset, take it back for another or forget about it if it's working ok - Cheers from Canada!

[@xtr3mso282]

U might need to check the secondary air injection valve, i changed everything in my car, including the fuse, the relay and the air pump itself but i am still having the same thing. So i ordered a valve and hopefully that will fix it.

[@A.CAL96]

@@xtr3mso282 thank you for the response, i didnt know we had to change the relay do you know which relay it is ? and which valve are you replacing cause i noticed theres 3 vavles connected to the the air pump

[@xtr3mso282]

@@A.CAL96 here is a video that shows where the fuse and the relay is. Hope this helps kzbin.info/www/bejne/fn-rnnSuhradotE

[@nordemoniac]

Mine sounds like a vacuum when cold starting the engine. Is it normal?

[@mrkongsimr]

So is there timing on fixing this for free ? Mine is a 2004 and makes this noice , but just for a while . Thank you !.,

[@Jaiflo6101]

Hello, excellent video and explanation. Question I have is what type of grease did you use to inject to it and how is the car today since you did that to it?

[@carquestions]

Any light oil you have kicking around - its just used to diagnose it - the joint was replaced a day later

[@gnomebmw]

@@carquestions what does it mean the joint was replaced a day later? So the light oil was just temporary?

[@waynebrown1907]

Awesome I'm doing mine the weekend.....will give feedback when sorted...

[@carquestions]

Good luck Wayne - remember it only comes on once in the morning when cold - after first start, it won't work again until it is completely cooled down

[@waynebrown1907]

Yes I know that I've been monitoring it in the mornings, some times its louder than other days..

[@waynebrown1907]

I've done mine last week and it run likes a dream, thank you for your video.

[@thomascurry3930]

Normally the sounds will shut off after awhile

[@carquestions]

It only comes on for 90 seconds or so on cold starts only

[@worldpeace5853]

Mine does the whistling/screeching sound under the hood on the 2012 ML350 4Matic. It exists for a few minutes and disappears. It doesn’t come in warm season but always in cold weather starts here in Minnesota. I replaced the serpentine belt but it was of no use. Recently, I got the P2279 vacuum leak error code/check engine light. I replaced the breather/crank case valve along with the 6 intake manifold gaskets with a local mechanic. The error code disappeared but I still get the whistling sound. I started later in the day yesterday and the whistling sound did not come. I researched a bit and found out M276 engine doesn’t come with secondary air pump. I have just given up since this is coming from the last 3 to 4 years but has never troubled me. It’s just irritating when I do cold starts. What do you think might be the issue please???

[@carquestions]

Take off the cover - and physically see if you have the air pump as seen in the video - sounds like the problem exactly - cheers!

[@omarm330]

W203 2002 C240 all my I/M are ready except for the AIR. Why won't this monitor turn on green check for it to be smog ready ? No codes for this SEC air pump.

[@carquestions]

Keep putting on the miles - it should turn on at some point if everything else is good -

[@alexalex-zg2mo]

Thank you very much!!!👍🏼🤝

[@carquestions]

Anytime Alex

[@jaden_litz9345]

This man is the fricken best

[@carquestions]

Thanks Jaden - Cheers from Canada!

[@eogutveren]

The motor brushes bad, I think

[@carquestions]

Probably

[@Generic1to10]

great video. thanks

[@carquestions]

Anytime Gen

[@kelvinleigh]

Question. I have an intermittent P0410 code on a 2005 C240 4matic. What do you suggest I do?

[@criticaluplink]

How about unplug it to see if the noise goes away

[@carquestions]

Good idea - but will generate a code - thats ok

[@CLIFFWILKES]

Thank you for the video I have the Crossfire and did the same thing check it out kzbin.info/www/bejne/eZa9ZZKcbJxroLc however the pump still did not work so I had to Solder the Rcm

[@corneliuswalker3319]

Hey Mr Mark I’m having a hard time finding a 1/4 torx t30 bit. Do you think a 3/8 bit would work just as well? I really appreciate this video you posted helps a lot thank you!!!

[@carquestions]

You can try CW but finding a T30 shouldn't be that hard

[@rodflood2878]

Excellent video technique. Our 2011 C250 was making a noise for a few seconds upon cold start which sounded like a bearing in a pulley (kind of like a squeal - instead of a jet). After a week the noise stopped but got check engine light and P0410 "secondary air injection system". Engine runs fine. Would you hazard to guess it is this air pump ? (Go Canada go)

[@carquestions]

Rod - When I said jet engine I mean - it's a very high pitched screech / squeal - so I think you definitely need an air pump replaced.

[@nothingtoseehere5760]

What is that curvy puller tool that you have? I would like to get one. Thanks! :-)

[@ioanniskalathakis4037]

How much is a aftermarket pump?

[@carquestions]

Best thing to do is a Google search for your area suppliers Ioannis - I'm in Canada - Cheers!

[@catchitcookit9449]

Awesome video I'm having the same problem with my 2010 C300 but it only ones for a Split Second but I have a feeling it will get worse and also the secondary air pump in America is only $130 that's a weird at cost so much there

[@Mikgwerd]

Just buy from FCPeuro, they have lifetime warranty...and you'll need it because this is one of the shittiest quality parts that Bosch makes.

[@라이언-d1i]

very very wonderful sir!!(^o^) me too same noise! i thought… ABC pump! but not ABC pump. thank you very much sir and always… please take good care of yourself sir☺💝💐

[@carquestions]

Glad to help - Cheers from Canada!