Ignition Coil Symptoms, Problems, Diagnosis and Replacement - EASY DIY!

[@javianjohnson8746]

This is great. Thank you for this breakdown

[@lesliebrew4789]

Great video. One of the best I've seen. Keep up the good work.

[@arvindiokno533]

A great simple video that makes it more reliable and helpful! Keep it up! Thanks

[@Linoge279]

Never heard of the coil boot got hole causing misfire, good info sharing

[@mujjuman]

this is the best way to diagnose. great video

[@kalamardoy2k2]

I was looking for that problem on my car for a week, I change the spark plugs, the air filter and valve cover gasket. But I didn’t check the coils!

[@TheDonz]

For me nothing came up on the scan tool, did the manual check, put a new ignition coil in and worked beautifully. My symptoms was when accelerating normally, it would jerk a lot, but would be ok when accelerating slowly.

[@jygogaming3550]

Having same problem as u

[@geo86able]

Good job, young man!

[@Enonymouse_]

Good vid, I am likely going to use this on a BMW bike to puzzle out a fault indicator that I believe is a coil going bad. But I will order a fault cod reader first.. Best guess till then is the fault code is likely a slow failing coil.

[@boejoe4145]

This just happened to my Infiniti Fx35 today. I was driving home and bam! Rough idling and slow acceleration. Got it to the mechanic and they said The coil in cylinder five was out. It’s impressive how one causes problems! Thanks man!

[@fcpeuro]

Happy to help!

[@rudyswartz9092]

Best video on this issue. Thanks a lot!

[@bv2999]

A+ Excellent! Appreciate to the point accurate presentation.

[@PJC2023]

Yes, please keep the DIY vids coming 👍🏼😎

[@tbraun129]

Thank you! With the OBD scanner it was hard to tell which was bad because the "firing orders" are different for certain cars. The manual way saved my ass just now!

[@OLASTUDIOSTV]

thanks for the video. I have a question, do you recomend to change all coils set at once or just the one failed?

[@fcpeuro]

You're welcome! Usually if one coil fails, the rest of them are nearing failure as well, so its always good to replace them all at once, however if you are in a pinch you can just replace the bad coil.

[@OLASTUDIOSTV]

FCP Euro thanks again. I just replaced the bad coil, but will replace all asap.

[@mjojrjr6231]

Exactly my question as well, glad it's on top 😊👍

[@cuttingedgecool7235]

Thanks for the video Mr. Foley.

[@johnnydeutschemark3620]

That one question I really have to ask: can't that small hole in the boot be patched w/ PC7 or something? Just to get you home etc. if you are far away..

[@jasoneyes01]

The older style Bosch stick coils are the best with the metal shield. They fire under load without fail. BMW has gone to Eldor since all the problems with the newer Bosch and Delphi. Eldor seems to be the reliable route for now. Eldor is used in Rolls Royce engines which speak for the quality.

[@SteveWeltman]

Great video... Excellent information on diagnosing and replacing a coil pack. Right up until the goofy swag promo ;) . I still had a good laugh. Subscribed! Thanks again!

[@sulaimanalkindi8486]

Excellent video man , keep them coming 👍🏻👍🏻

[@darrendanger6853]

If you find one bad coil, do you recommend replacing them all or replace each one as they fail?

[@fcpeuro]

When it comes to coils, we recommend doing them all, as if one fails, the rest are sure to follow.

[@AGolfrGuy12]

07'323, This video was incredibly helpful. Thank you

[@fcpeuro]

You're welcome! Glad you found the video helpful!

[@fahmiahmed1269]

Thanks, great video

[@isaaccavazos7311]

Thank you bro!

[@saraharmbruster7447]

Can coils be bad and not throw a code or the check engine light?

[@franklinherrera1549]

Let me correct something I might be wrong . My 535i has bosh coils with the silver liners and they are originals . Just did a tune up at 80k .

[@jnineneuorpe8841]

great video. every clear and just a superior explanation. Thanks

[@johnstrutt6998]

excellent diagnosis and quite simple to do i just got mine done and cost me190£.00

[@jameslynch5594]

Im gonna replace the spark plugs and/or the coil packs on my 2006 Saab 9-3. The engine keeps misfiring whenever I give it gas, hopefully this will solve the issue!

[@easilyoffended9535]

Can you give me an update on if it worked I'm having the same problem on my 06 9-3

[@jameslynch5594]

@@easilyoffended9535 it turns out I had a bad coil pack on one of my cylinders. It was an easy fix too! Make sure to get the black top coil packs. And make sure it’s an OEM part too. I also sold my 06 9-3 because it failed inspection, the repairs were worth more than what the car was valued at 🙁

[@adrianjohnson7465]

Good looking out!!! big help!

[@SOGKash]

This saved my pockets.

[@fcpeuro]

Awesome, Aaron!

[@philippifer1488]

In this particular example, could not just the rubber insulating boot be replaced since it clearly had the defect? I imagine the coil likely could still be operating correctly, but the spark was exiting through the defect in the boot instead of down to the plug. I could not really make out any discoloration in the boot around defect though in the video to support this possibility. It makes more sense in my mind to repair the part with a new boot at a fraction of the cost of a complete coil if that is the failure. It was $5 for a boot vs $60 for the coil on my Volvo. Maybe that is not possible with the coils on these vehicles. I don't know. I'm just researching frequent failures and repair/maintenance on these cars because I am considering a purchase next year. Regardless, an easy fix without specialized tools and the car is running correctly again, and that was the point of the video so well done.

[@fcpeuro]

Unfortunately, the spark plug connector (boot) is not a serviceable item on this style ignition coil for BMW's. In this case due to the damage on the connector it is required to replace the entire coil. The most common failure for ignition coils is the coil itself failing. Discoloration of the insulation is not always an indicator of an issue. Generally speaking a misfire due to an insulation problem is almost always a tear or hole in the rubber boot.

[@sidcalayag3498]

The car is Mitsubishi Lancer 2004. It won't start due to a defective ignition coil. Lube oil is flooding the cylinder as well. After replacing the ignition coil assembly, one of the ignition coil felt warm even when the car is switched off. The mechanic thinks the electrical system is grounded, but couldn't confirm the trouble. Please help

[@scottmckean2900]

Thank you!! I’ll subscribe and if need be, you’ll be my go to. Very helpful

[@Lilmain98842]

Great video.

[@mancave7]

Would have been *REAL* nice if you had attempted to temporarily fix the coil by wrapping electrical tape over the hole and retried the test. If this coil failure happened while out in a remote area, the tape fix would get you a shop or store and not possibly harm the engine. $.02

[@donaldhollums3278]

I’m subscribed. I need the diagnostic tips, the easier the better. I have an owner of a 2001 Land Rover Discovery, the vehicle will crank but not start. I asked the owner if the tach needle moves while attempting to start and he said “no”. I suspect the crank position sensor. The owner had someone else look at the vehicle and a scan tool was connected. That revealed an ignition coil to possibly be bad. I’m going to the owner’s house Thursday to check both of the possible problems. A wiring schematic I obtained does not show which of the three wires from the connector are what. I noticed upon looking at a connector for that ignition coil there was a red, a black, and a blue wire. I would reckon the red is for the power, black is for the ground, and blue is for the signal to the computer. I want to properly diagnose the coil with my multimeter and I want to check the proper terminals that the connector plugs into. What do you reckon? Also, I attempted a spark test but after testing three of the eight spark plugs I wasn’t getting a spark at all. To me that didn’t seem right.

[@uwaborgodswill9838]

Thanks for the video. Does bad ignition coil cause drain of battery

[@hunnitkaydj]

No

[@mariamunozespinoza5301]

Hey so I replace the spark plug on cylinder 1 after giving me a misfire and even changed the coil less in October 2022 and now it's making my car stop and go into neutral until the car FINALLY comes to a stop and it makes clanking noise on the back tires and I hate turn on the engine again but i noticed it happens when I come to a stop and sign or light intersection and when it's time to accelerate to go that's when the engine turns off and goes into neutral as nd steering wheel gets hard and starts make the car to come to a stop but is put into Neutral and makes a loud clanking noise on the rear ties until it comes to a complete stop. I already went to AutoZone to get it checked for codes and no codes other than the ambient sensor but I already replaced it and my ac don't work cause I don't have the money to fix and my son who just 14 months old and I can't afford to be without our car since we are currently fleeing from my abusive ex boyfriend to keep my son safe and give him a better life which he deserves it and I feel overwhelmed and defeated to that things are not coming out right or what I hoped it would be better because we are in a DV shelter but this Domestic Women's shelter is ok with providing a roof but only for a month only until I find a place and money to get away and start a new life with my son but now my son just got diagnosed with a delay in his motor skills and communication skills and now he's developing symptoms of an autistic child but they are not saying we need to wait until he turns 3 to diagnose him and give him the treatment or help he needs to treat autism. He's 14 months already and he's still doesn't walk. I'm beyond grateful for FINALLY having my child away from our previous violent and abusive home and now we can sleep comfortably but we still have some traumatic episodes at nights but we go to sleep knowing we are safe and that's all I want for my son to be happy and enjoying his time as a child but with all these new set backs I sometimes feel like I can't do it on my own raising him with no money and no job and no luck in getting any job offers. Sorry fo telling y'all my Lifetime sad story but I just had to let it out and tell someone so I can remind myself to not go back to the abusive relationship because I feel like I can't do it or find a way out to my struggles in being a single homeless mother with her 14 months old son. Ok so do y'all know what can be wrong with my car......it's a 2015 528i bmw f10 n20 engine to win turbo??? Please any advice what it can be and how I can fix it please 🥺🙏🥺🙏🥺🙏👩‍👦👩🏾‍🔧

[@ripowellripowell]

I've replaced 2 on my '07 Altima in the last year. I was stoked! I don't know much at all about working on engines. Both times my check engine light came on (though even if it didn't it was quite clear something was wrong) so I had it diagnosed at an auto parts store where they told me exactly what the issue was. Could a coil go bad and not set off the check engine light? Also, does a coil gradually go bad or do they simply either work or not?

[@fcpeuro]

Typically a bad coil will cause a misfire and set the check engine light off, depending on how modern the car is. Coils typically age to the point where they no longer work, however you can have a failing coil that will cause intermittent misfires.

[@anthonypipia6990]

@@fcpeuro my 428i jerks and stutters with acceleration. I have a check engine light but no codes say anything about misfiring. Do you think replacing the coils may be it?

[@Sal3600]

@@anthonypipia6990 yes check and change the coils manually like in the video. Same thing was happening to my car. Fkn shaking was scary on the highway.

[@MarkOBrian]

Would it be possible for you to do a DIY video on changing the rear driveshaft or changing the pick up rings, reluctor rings on a bmw e46? I have an ABS issue problem with my car and I've been told to replace them but the price they are charging me is crazy!! if you could do a video please i would be able to give it a go myself!!

[@buysellnypropertieshomes46]

Hi, Last week, I changed my spark plugs on my e60 and two ignition coils. A few days later my car couldn’t start. My e60 cranks but not starting. Do you think it’s the ignition coils?

[@morrisjms]

i hope this wil work i put in new sparks today but now its idling the same as in this vid. so tomorrow ill chabge all 4 coils and hope its done .. did all this cuz between 2-3k rev. it releases boost like 1-3 times in a row but now with the new sparks at .022 it does it like one time at 4k revs only whilst punching the throttle whilst driving .. but eith all that no check engine light or annything 🤦‍♂️ PLZ SHARE YOUR APINION ON THIS

[@Phettraining86]

I just spend nearly 3k on my car at a highly recommended shop. I’m a bit disappointed I left and my car has other issues it didn’t have before. They did a full tune up Including oil change and spark plugs. My car has a slight vibration when I stop at the light. I notice the car revs up before dropping idle before I come to a complete stop. I’ve been there twice to complain about the issue. My trust is loss and the fact I didn’t have this issue before taking it in.

[@markmulligan9280]

Well done. Thanks.

[@bjornderoderidder479]

FCP Euro I owned a bmw 320i 2007 and suddenly my car started jerking in all gear position P,R,N,D. Especially when i pressing the brake at fully stop the cars is jerking heavy and i also noticed that the gear lights on the dash is flashing when it jerking. Can this cause by a defected ign.coil? Please help

[@michor10]

have you tried not jerking it while you're driving?

[@dr.feelright434]

I have a 2004 330ci and I got the PO302 code. I changed the coils, plugs, the injector at #2 and STILL misfiring. You said "wiring" and that makes me think that there is no power to that coil due to a wiring problem. Where should I begin?

[@glauco493]

Hello, good video! I have a question. I have a BMW 540i 97 and when scanned appeared failure in five cylinders. In this case can be the coil boot ?

[@ryanpoloski4322]

You really should have showed how the scanner followed the coil pack.

[@interex956]

Can an ignition coil that is beginning to go bad cause drivetrain malfunction to appear on the idrive yet not show a check engine light? The next time I turn on the car, it runs smoothly again until the car mishandles again. Pretty random

[@JuanGarcia-kg2lq]

I changed the coil on my BMW 535ii 2011 but still had Check engine Light It's still on

[@fcpeuro]

Hi Juan, you will always want to reset the check engine light after doing your repair.

[@WrecklezzENT]

This is cool

[@Sroor2023]

In nissan you are not getting code for coil and some toyota cars no codes and in maxima coils are underneath the plenum so it's not easy you can check front then swap them back and coils on the back shift it infront and check big headache 😅😅😅

[@diegogutierrez2123]

I just change the spark plugs on my 2003 honda civic but when i was putting the spark plug back it crack when i was tining the crew do i need to change the coil or its still good i just change the coils like 3 weeks ago

[@cablonde2222]

Hi I have a 07 750li I'm getting p300 code along with 304 305 302 308 301 do you think it's the ignition coils?

[@fredcaroline7600]

The first start, it runs 2 cylinders, I let it runs for 30 seconds then turn off and restart it, and it runs ok. What was happening? Thanks

[@skhosanamathiyane]

Nice job man wow,,,, South Africa

[@fcpeuro]

Thanks for the love!

[@stefanichev2684]

Very good

[@Phaks93]

So what if you have done all this that you have shown on the video, except plugging the diagnostic machine? And still have the misfire? Replaced spark plug and coils but still.

[@fcpeuro]

Hi Phakamisa, you always want to clear the codes after replacing plugs and coils.

[@AnthonyJaya]

When one ignition coil goes bad, is it better to replace all the coils as well or should I change each one as necessary? Also, should I change the spark plugs (the whole set has been replaced within the last year)

[@fcpeuro]

If everything has been replaced within the last year you can replace the one ignition coil.

[@cedricgcloud8981]

How to take off the cilp in

[@KiiratX06]

Can anybody help me with why drivetrain malfunction comes when car is warm and gone when car is colder.

[@birtan812]

hello mate. i have a F30 which have N13 engine. sometimes i see engine check light on cluster. When i runs diasnostic its give me this error: ignition coil. All cylinders. open curciut. But my car working correctly. what is the problem ?

[@albertrosa9954]

Awesome!

[@pastmedia]

My 2005 BMW 545I with only 77k misfires and sometimes I get misfire codes (by various cylinders, not always same cylinders )by obd2 scanner , other times I don t get codes. This happens only during cold start up in the morning after car was left overnight. it vibrates, shakes and misfires at cold start up but once it s warm, it s good for the rest of the day, even when it s still cold out. what causes this? I replaced valve cover gaskets, spark plugs, oil filter change, any ideas?

[@fcpeuro]

A bit of further diagnosis may be needed, but often times bad oxygen sensors can also trigger multiple misfire codes and cause a rough idle, on our "older" BMW's.

[@nicholasvonrhine541]

Outstanding

[@justgosee]

THANK YOU! :))

[@fitchue1]

what about coils on mercedes benz 1994 S420?

[@matttoms500]

What if the there not individual coils and you have a coil rail

[@gregorysanders4611]

89 Chevy 1500 2wd, very rough idle, when stopped, engine stop, will restart, pulsing idle,

[@Time4House]

gonna do this to my E39 540i now

[@tangeliagreer2239]

My car is in the shop right now for bad coil and other stuff. The total is over $600. My car would jerk, hesitate and shit off while at the light. There was a ticking sound and smell of gas. I live in Miami, Fl

[@jamesonlaguerre7528]

Did it fix the problem ?

[@jamesonlaguerre7528]

What else was wrong with it

[@garycooper1644]

I had one go bad as well...had to have it fixed so it was $500 parts and labor... I had no idea what was wrong so I had to pay the price. While I was waiting I looked on KZbin and found out it's done... about a 15 minute job that anybody can do... paid the price because I didn't know...they used an aftermarket part from O'Reilly and charge $60 over what I could have paid if I bought myself. If you drive too long with the bad coil it could burn out the catalytic converter so now I know what to do if happens again.

[@martynh5410]

Great! I had an identical issue on sons 2007 e83 X3. We needed to fix it right away so bought one from Autozone as they had an equivalent in stock. It fixed it but given the high mileage of his car I’m going to order a complete set from you. The one I took out looks like Bosch unit. Do you have these in stock?

[@fcpeuro]

Yes, we have them in stock.

[@Luis92r]

What can cause this same 2012 528i 4 cylinder to stall while driving randomly usually when I punch the gas ? Help ?

[@fcpeuro]

Hi Steph, It's difficult to diagnose that kind of issue without seeing the car. I would recommend bringing the car to your local service center to get it diagnosed. Once you determine the issue, we'd be happy to help you find the parts you need!

[@TheJustyjus]

I had a quick question, my cable from cylinder 3 to the ignition coil isn't giving any power. do u know what might have happened. I have a 2014 328i N20

[@fcpeuro]

Start with the obvious things like checking ignition coil fuse, and move on from there. How do you know its not getting power, assuming you tested with a multi meter for power at the connector with key on? If so, you might have to trace the wiring, could be a broken or shorted out wire somewhere in the harness.

[@jamesm6918]

Is it possible (or common) for a brand new ignition coil to go bad in approx 1000 miles? I had all of them and plugs changed in my last service a couple weeks ago and today the car is driving and idling real bad. The coils are bosch

[@fcpeuro]

Anything is possible, have you checked the codes? If you purchased them from us, feel free to email [e-mail] and we would be happy to make it right.

[@elijahbourbanboateng3942]

I am using a hyundai elantra and it jerks intermittently whiles driving. can it be a faulty ignition coil?

[@RagingGamer018]

Elijah Bourban Boateng ever figure this out?

[@narasimhasavva9383]

can you tell me how to reach 5th and 6th ignition coil (which are very inner side) in 2011 BMW 535 ix drive?

[@fcpeuro]

The cabin air filter box will need to be removed to gain access.

[@kevincunningham4549]

I replaced my coil after having it checked with a scanner at my auto parts store and now my car (328xi 2011) runs and idles fine but the service engine soon light has yet to go off 32 miles later. Is this something I may have to delete with a scanner? Or will it go off on own?

[@fcpeuro]

Hi Kevin. If the service engine soon light does not go off after more driving, you will probably have to clear the old code. You can have a shop do this, or you can purchase your own scanner, that way you can check and clear your own codes. Here is a great scanner/code reader: www.fcpeuro.com/products/maxidiag-md808-professional-obdii-scanner-autel-md808p

[@monirobaid5809]

Can I do this procedure on a 2003 Mercedes E500 because I've Been Told doing so it can damage the ECU ,my scanner show that I have cylinder 2and 3 misfiring and I'm hoping that could be the coils not something before like cable harnesses or fuel injectors I've already installed 8 new spark plugs so I want to do the manual test but I was hesitant plz let me know if that is Okay to do so thanks

[@fcpeuro]

Hi Monir, your engine has 16 spark plugs as its a dual plug per cylinder design. Additionally, yes you should be able to swap coils from the other bank to isolate which ignition coil is the issue.

[@krybaeavy2277]

Do u know if bad ignition coils n spark plugs can cause a bmw to go into limp mode,? And can it cause it to shut off after putting in gas?

[@fcpeuro]

It is quite possible for those parts to cause the car to go into limp mode, but simple misfires are more common symptoms of these parts going bad. If your car is shutting off after putting in gas, you likely have another issue. We'd recommend finding a local mechanic to help you properly diagnose the issue then coming back to us when you need the parts. We'll help you get exactly what you need!

[@Majowa0]

What if ignition coil is stuck?

[@fcpeuro]

Hi Natalia, sometimes they can be a bit stubborn, just give it a good tug and it should pop out!

[@johnjones1693]

Hey question? Do the misfire cause a stall? I have a bmw 330i and I’m getting codes (29d2-29d9)

[@fcpeuro]

Misfires can cause your engine to stall if they are bad enough, however that code you are getting is likely a bad fuel injector.

[@faniusmoji231]

Can you please help my BWM 320i e90 does not start, does not engage ignition. No ignition lights on the dashboard. This happens after having a battery issues. What could be the problem?

[@fcpeuro]

It sounds like you still may have a batter issue or a battery connection issue. Check for loose connections at the battery, loose ground, loose positive wire, etc.

[@faniusmoji231]

@@fcpeuro thanks the problem solved. It's like there was a system break down between battery system and ignition system. The car was fine after being synchronised.

[@MrMandoz82]

Aprendí algo👍🏽

[@jamarjones6754]

My Volvo s60 heater color 5 hose busted and oil sprayed all over the engine I fixed the hose but now when I try to start the car my car won't crank all I hear it's a spinning sound coming I think from my starter I changed the starter but I still get the same problem what would this problem be and how would I fix this problem

[@fcpeuro]

Hi, Jamar. I'm not sure what you mean by heater color 5 hose. Do you mean your heater core hoses busted? If so, coolant would have probably sprayed out rather than oil and you possibly could have overheated or damaged your engine.

[@jamarjones6754]

@@fcpeuro yea I changed my spark plugs and they were drinched in oil went would that happened

[@haraldmuller3307]

Thank you Sir! Your clear explanation helped me find the cause (coil #2) and fix my 2002 E46 (195000km) real cheap. How can I send you a few €€€ (PayPal?). This saved me hundreds. Ordering a T-Shirt at your site does not work (shipping to Germany...) Greetings from Munich (where they assemble some of them Bea-emm-veys)

[@fcpeuro]

You're very welcome, Harald. Glad to hear you were able to fix your E46! No need to send us anything, we're happy to always provide these free videos to everyone!

[@jansen-xt2ow]

My f30 n20 was scan by dealer high pressure rail sensor.the sympthon crank cannot start the engine.sometime i can start the engine suddenly for a few minute or second the engine turn off.drivetrainnmultiction. its is true the high pressure sensor fault?

[@fcpeuro]

It could be! You said the dealer scanned the car? What did the dealer say the issue was?

[@jansen-xt2ow]

@@fcpeuro the dealer say that is high pressure rail sensor fault .The dealer already erase the fault but want to check again either the fault still or not. Rail pressure sensor fault the symphton is crank cannot start and sometime the engine is turn off and the rpm go down to 0 from 1???

[@klaybeck8518]

Link pls for kit for this including spark plugs for bmw 328i sedan 2008 e90.

[@fcpeuro]

Here's a link for the ignition coil and spark plug kits for your E90. www.fcpeuro.com/BMW-parts/328i/Ignition/?year=2008&m=20&e=2053

[@mastermine4eternity243]

You didn't mentioned if the check engine light went out immediately

[@fcpeuro]

If you had a check engine light before, you will want to clear the code after replacing the coil packs, the light will not go out immediately.

[@joelane4670]

would you change the plug as well?

[@fcpeuro]

Changing spark plugs is always a good idea since they are cheap and easy to do!

[@miloaaron8388]

my b2200 will run for most of the day then it will turn off like a switch and and wont start again. and then the very next day it will start again, and repeat the same process. could that be a bad ignition coil? i am completely stumped. PLEASE HELP!

[@fcpeuro]

Would not suspect the issue to be ignition coil related. Ignition coils will cause misfires and rarely will ever cause a vehicle to stop running. Without further info it's hard to say for sure what the problem is but seeing that the truck turns off like a switch is being flipped it sounds like an ignition switch issue which is pretty common on B2200's.

[@nossrc5638]

My car went in safe mode also wont change gear faul and i change the coils and erase then woks fine , is that is normal ????

[@glasser2819]

you need to scan you OBD2 port to understand what module is acting up or what sensor is bad! Transmission in "Limp Mode" is a serious issue to prevent more damages.

[@mrnajee1]

What scan tool is that

[@johnnydeutschemark3620]

iCarsoft ....is printed as its label, (0:44) search that ...find this: HD I for Heavy Duty Diagnostic Tool $295.95

[@rajanbrar6561]

won't that change firing order for those two cylinders

[@kcmescal2618]

No he moved coil one to the number two and two to one, but did not move spark plug wires which would of changed the firing order

[@rajanbrar6561]

@@kcmescal2618 but the electricity is coming from the coils.....

[@kcmescal2618]

@@rajanbrar6561 there cool over plug, so the charge is the same, coil over plug can be placed over any plug and will be the same, but defect will show up where defective coil moves to, same can be done with a wire or plug

[@MrPhantom2183]

What scan tool did u used ?

[@fcpeuro]

An iCarsoft scanner was used.

[@glasser2819]

buy yourself a FULL BUS scanner for $50 more... you will have access to all the car 30+ modules! Dont buy a limited "check engine light" ("4 systems") scanner or you'll miss the whole picture. The OBD2 CAN-BUS was developed by Bosch, everyone else was forced to join the wagon

[@tatianaparavicino3719]

So you think Delphi it’s better that bosh for bmw??

[@glasser2819]

Bosch parts are purposely the bottom of the barrel, anything else is better

[@brian200mr]

It would be better to disconnect the injector associated with the specific cylinder in question as disconnecting the ignition coil pack cuts all combustion in that cylinder sending more raw gas downstream that isn't particularly good for the catalyst.

[@arnolduk123]

I would of thought modern later 2000 upwards vehicles with engine management would detect a major misfire/bad coil in a cylinder and automatically shut off the affected injector. The cats costs $$$$'s and to not have a fail safe system in place to protect them from such a small component failing would not be a smart design idea.

[@glasser2819]

@@arnolduk123 these car are built to eat parts, everything goes: rims, cats, coils, intake manifolds. The home mechanic understands that 1 coil being bad announces the others going the same way

[@arnolduk123]

@@glasser2819 A bad coil does not mean all others are going to follow. The injector could be at fault causing misfueling in the cylinder or a breakdown of one of the spark plugs. So replacing all coils would not fix the issue which would eventually reappear. Although at major service intervals it would be wise to renew all coils and plugs.

[@maryannmjones6021]

How much doesthe coil cost

[@fcpeuro]

www.fcpeuro.com/products/bmw-direct-ignition-coil-12138616153-1

[@arnolduk123]

When an ignition coil fails completely, isn't the injector automatically shutoff for that cylinder by the ECU DME module ? I would of thought there was some fail safe mode built into the engine managment to prevent the injector firing unburnt fuel into that cylinder. In particular a 2004 BMW E46 I have a dud coil and worried about any unburnt fuel that could upset the pussy that lives in my exhaust :).

[@glasser2819]

by now you may have noticed German cars just eat parts... If you melted catalitic converter, the secondary down_stream O2 sensor will set a CEL Code!

[@crimpcreep6887]

Change oil too, gas saturated.