Doing This Will Make Your BMW N47 & N57 Engine Run *PERFECTLY*

[@nickkaarslev290]

Ive gone from 119k km to 173k km in my e90 320d n47, only done oil changes, it runs like a dream, pulls hard!

[@jasonwaller6778]

Do frequent oil changes, let it warm up, drive it like you stole it then let it cool down. Do this and you won't need to change anything.

[@davidga6272]

Maybe turbo but that is ok

[@doubleL_S]

Every single n47 blows around 150k. Timing chain is badly designed and designed to break.

[@jasonwaller6778]

@@doubleL_S plenty in Autotrader with 200k+, one had 264,000!

[@mtaFTW]

@@doubleL_S have you ever even had one or are just basing your terribly wrong opinion on random internet horror stories? My N47 E92 is at 400k km (or 250k miles) and running incredibly strong, even passed emissions test with DPF off and stage 1 tune :)

[@doubleL_S]

@@mtaFTW I just spent 2500 on it getting 2 chains repaired and the entire top end replacing. They're weak.

[@thereal1806]

Everything is true from A to Z, best video for N47 that exists... I changed DPF with Downpipe, Intake manifold cleaned, EGR removed, swirl flaps removed, everything was coded and Stage 1+... Car now feels and drives 1000% better, i feel like i have different car. In love with my BMW AGAIN! ❤

[@samanthawoodward7551]

I have a N57. Oil changes every 6000k miles done by myself ♀️. Currently on 120k and about to have chains done. Bloody amazing machine. Gentle warm ups until oil temp is up.

[@TheDawgydawgdawg]

My '09 e60 n47 is still going strong at 371k km, amazing engine. Dpf and egr still on

[@liviu7017]

have you ever did a timing chain change ?

[@TheDawgydawgdawg]

@@liviu7017 yeah, at around 360k km

[@liviu7017]

@@TheDawgydawgdawg nice, any symptoms at 360k or didn't wanted to risk it more ?

[@TheDawgydawgdawg]

@@liviu7017 just preventive meintenance, don't risk it unless you know 100% when it was last changed. When i got the car the owner said it was last changed around 100k km ago, which was probably true but he did not have a receipt.

[@TheDawgydawgdawg]

@liviu7017 No symptoms except big oil leaks, but it wasn't caused by the timing chain, just the previous owner lack of care. Just change it, and you're good for 100-150k km:)

[@M3RacingBlue]

Some PPL Buy a car and have no idea about doing any Maintenance, This is a Great Video well explain, People need to learn Thank You George

[@AA-ki3zw]

George that's good sound advice, worked at a BMW dealers for 15 years, the School run X5s and 1 Series Diesels were the worst. But the same cars when owned by motorway high milers we saw less issues. The emissions gear is for a perfect world , we don't live in a perfect world and why i chose to delete EGR system and ran straight pipe on my old 530.

[@amk1984]

My N47 has 216000 miles and still going strong. All I've done is changed oil and filter every 10k miles or sooner religiously.

[@GeorgeAusters]

Good to hear!

[@zukacs]

@@GeorgeAusters im just reaching 200k km and ordering new timing chain kit for 100$ just to be safe

[@GeorgeAusters]

@@zukacs $100? Don't bother

[@weldingjunkie]

No injectors or glow plugs? Hmmmm

[@amk1984]

@@weldingjunkie nope, still on original glow plugs and injectors. I also replaced other obvious filters from time to time, such as diesel and Air filters every 50k. Car has literally never been to a garage except for annual MOTs and tyres etc.

[@nemz7505]

Keep em coming George, good stuff! Easiest way to see if your manifold is full of carbon is undo the air-charge sensor bolted onto the manifold with one 10mm bolt, check the hole in the sensor itself and make sure it's not blocked with carbon (unblock it carefully with something plastic, don't push too hard into the sensor). Then with a phone light you'll just be able to see into the manifold through the hole where the sensor came from and how bad it is. It's not a hard job to remove the manifold, decoke and refit giving the ports at the same time. A caustic soda bath will clean the manifold perfectly and won't attack the plastic, leaving it looking like it just came out the factory, in some cases giving you a noticable boost in power if it was badly coked. Don't forget to remove any sensors or electrical components before giving it a bath ;) Don't waste your money on a hydrogen clean, it will do absolutely nothing to remove carbon build up in the manifold but it will empty your pocket somewhat with no real world benefit. If your top timing chain is stretched and tensioner is loose it'll rattle on cold start for a couple of seconds, middle chain will make a wooshing sound at 1500rpm when engine is warm. Any of these noises are a cause for concern and it needs a full timing kit ASAP. N47 engines can suffer from broken chains from as little as 85,000 miles depending on the number of services and oil quality. Cheap rates for any of these jobs for George's subscribers around the Merseyside area :D

[@GeorgeAusters]

Yep that’s the MAP sensor👍🏻

[@spencerhulme1203]

@@GeorgeAusters MAF?

[@GeorgeAusters]

@@spencerhulme1203 No MAP sensor... Manifold absolute pressure sensor👍🏻

[@spencerhulme1203]

I did mean to say MAP lol why i put maf in i do not know - but you are right as always i took mine out the other month and what a difference with a clean down into the sensor hole - did not clean the whole unit as suggested bloody crippled NHS bosh job.

[@am_jeds]

Where abouts is the MAP sensor located please on an N57 engine?

[@PoppinPortraits]

Spot on George. Yes £1k got me a full chains replacement at 172k. I could hear the engine getting noisier on a cold start. She was like a new car afterwards. Now my oil cooler gaskets gone at 195k which I’m replacing at weekend. ✊

[@valypiu61]

You totally right mate. I just installed a TDI Tuning box on my n47 with 137k miles. Really feel the power.

[@GeorgeAusters]

Good stuff!

[@davidsayer7182]

You gotta link for the tuning box

[@valypiu61]

@@davidsayer7182 tdi-tuning.com/en-gb

[@MrNathan2J]

i got one my x1 makes hell of a difference

[@valypiu61]

@@MrNathan2J just make a diagnostics to check the errors. In my cause the tuning box gave it two hidden errors....and my car wasn't able to regenerate the dpf. I'm sorry to say but is a waste of money. 😢 stage one software is cheap and better.👍

[@danparaschivoiu8620]

I have everything off egr, dpf , also hybrid turbo and 3.5 d injectors ... 360 hp and 700 nm and is a beast very good consumption also .

[@GeorgeAusters]

Nice

[@ziyadyusuf2728]

On a 320d?

[@yashmann]

If you dont mind me asking what turbo, thinking of doing this on my mini sd.

[@Koloxwy]

Will chaindie soon :)

[@KapitluTlettax]

@@yashmann uses the same stock turbo but making it a hybrid turbo at a turbo shop, bigger injectors like he said 335d injectors and bigger intercooler :D

[@grahamemwl]

Got an n47 123d with a stage 1 map cars just over 98000 miles got it on 75000 done a few oil changes and it's a cracking little motor

[@Bokka-7]

great video, thanks, just purchased a 80k f22 n47 so this has been really useful. cheers

[@rover100bunson]

on our diesels i dip our map sensors in acetone a couple of times a year and clean egr valve, keeps them running well

[@chawenhalo0089]

Most people assume EGR issues when rough idle on cold starts. It's a simple case of changing the engine glow plugs as they're not just there to assist compression in cold temperatures. They're used by the DME (diesel engine management system) as a sensor to ensure smooth operation of the engine. It's basic maintenance as you would change spark plugs on a petrol engine (although they are far more difficult to remove without breaking). And to anyone who thinks removing the EGR is a good idea: bear in mind the engine was designed (and it costs €Bn to make an engine) from the ground up to run with FAP and EGR. For example EGR reduces engine load / stress during light throttle applications.

[@zblinkk]

I want to mention if you have bad flywheel or bad crankshaft pulley on n47 you can stretch ur timing chain from all those of vibrations. It is best to maintain this engine. I have e90 n47 177hp and omg it had so many problems at 322k kilometers it started to make timing chain rattle. So i pulled out gearbox i saw clutch wasnt in the great condition flywheel had all that liquid from ir falling out dpf was fully damaged idk how my turbo wasnt damaged that much. So change all The gaskets timing chain flywheel pulley belts removed dpf egr is still in place but programmed out swirl flaps removed and now has a remap 206hp and 411nm best daily driver. And by The way timing chain was still original on 322k kilometers. I bought it at 287k kilometers.

[@neliodasilva6301]

Perfectly explained sir,cool😊

[@GeorgeAusters]

Thanks and welcome

[@catalinbandas]

Great video George, very supportive. Since changing oil regularly is by far most important thing on these engines, pls share some sugestions on oils to be used.

[@theprodistini2590]

Use a good brand synthetic low ash oil. This is important for your dpf. The bottle will have a rating on the back if it’s low ash. At least in America they do. Change every 3-4000 depending on driving habits and enjoy your car. Do not under any circumstances fall for the “annual, 10,000 mile” oils they sell. In a typical car this may be okay. But not in these

[@mikegalvin4655]

His liquid moly for bmw diesel motor is a good brand

[@danparaschivoiu8620]

Liqui moly 5w40

[@nickkaarslev290]

Castrol edge 10w30 ll4 approved 👌

[@PoppinPortraits]

Well said brother. There’s no such thing as too many oil changes. Black oil ruins everything!

[@chrislowe9211]

Excellent video, very clear and informative. I'm looking to get my timing chain replaced (N47) as a precautionary measure before it has the chance to do any significant damage. Any tips for finding someone as thorough as you?! Do you do paid work on subscribers cars or do you only work on your own cars? Your content is extremely helpful for novices such as me - keep it coming!

[@GeorgeAusters]

I can do some work Chris but nothing major as I don’t have a lot of time or space. I can do servicing, drive belt kit, EGR delete etc. Best to email me👍🏻

[@thefiestaguy8831]

My best tip is use a decent oil. I used to use NAPA 5W-30 for my 67 reg F30 335D X drive N57 engine, as I got it at a heavily discounted price due to a family member working for a motor factor company, but always found that the throttle response and power produced wasn't as good as I recalled it being when using the NAPA oil. Having recently had the oil changed 3 days ago, and this time using CASTROL EDGE 5W-30 BMW Longlife 04 oil it performs MUCH better. I used to have to put the car gearbox in sport mode by pushing the gear selector to the left for overtakes. Since this oil change I now don't have to do that, the kickdown and power is where it should be.

[@whatta7793]

Look into some products made by "Hotshots Secret", they might have an oil additive that you may like. Do your own research on them. Might simply be something that you would like to add to your maintenance plan. And, it might not be, but just suggesting to check their products out. No, I do not work for them lol

[@poluchoquintal3369]

Thanks George for your videos I am going to buy one from my brother and being an Aircraft Mechanic, this estimulates my self on doing the maintenance myself other ways this project will be a lot of money. Regards from San Antonio Tx

[@GeorgeAusters]

Epic! Which aircraft do you work on? Id love to work on a Cessna! Good luck with the project🙌🏼

[@Backtrap1943]

Very very good advice. Keep it up George! N47 User.

[@GeorgeAusters]

Thanks, will do!

[@syedislam6286]

Dont the deleting affect the mot?

[@the8walls]

My 730d F01 is on 220k mile (350k KM) and is still running sweet. It had a chain done at about 180k but apart from oil changes and basic servicing it’s not needed anything else and never missed a beat. It runs quiet and still does 150mph. Next job is to bypass the EGR etc as it’s getting to the stage where I probably have a bit of carbon build up in the injectors etc.

[@whyulyin]

My 2011 e90 320d runs like a dream 197k (miles) and great original chain also😮

[@gtwhome]

I've always been tempted to do an EGR delete - but then I read about burnt exhaust valves and cooked turbochargers ... as the EGR system keeps combustion temperatures down.

[@ShoManChannel]

Lovely video, very informative. Could you please tell me if all the issues you mentioned are fixed in B47?

[@thatsentertainment5602]

Can regular oil and filter changes prevent the potential timing chain failure?

[@user-mq8eu8bk6v]

Defo

[@QuattroBajeena]

Ive changed my timing chain on e92 2009. Before i bought the car in 2013. Car was £14k. I managed to get it for £13k then used the £1k to do the timing chain :) Still got the car and love it.....but ulez in london is telling me i cant drive it no.more. :(

[@karlj.4798]

Just found you on youtube George. Great info. Subbed!

[@GeorgeAusters]

Welcome aboard!

[@a.d.7042]

how do you pass the technical inspection? In Germany wouldn't be possible without EGR and DPF!

[@astuteventures]

Don't think it passes in UK either?

[@tuningforever]

Beautiful your words

[@Breaking_views_uk_official]

My bmw 2L 1 series m sport automatic is at 66 k will it be due a new chain

[@3rdbanwavey121]

Can I use fuel additives with this diesel engine or not

[@ashrafalsaffar356]

Great video and comprehensive advice.

[@alexandru.pintican]

Thank you for suggesting and encourage me to make my car road illegal! Great tips!

[@GeorgeAusters]

You're welcome!

[@karolisbickus7313]

I will be replacing my timming chain wery soon.. thats why i am waching this video 😂 my bmw has 308000km on dash. I checked it yesterday because I had to replace cover gasket. Cain is nearly gone tho.. top sprocket teeth look like shark fins 😂😂😂

[@clintupham4466]

As far as oil services go, I would recommend getting oil samples in and making a determination on the type of mileage you put on. One person's 5000kms can be much different than the next. And one person's oil choice may be different than the next. No sense needlessly changing oil when a lab can tell you. Run 8000 kms and test it to see if you can go longer or shorter. Simple.

[@kianward5999]

great stuff all the time pal keep up the good channel

[@WarlockSRB]

...what about N57S? I assume it is same thing with that one too... Looking at F11 LCI

[@gantha]

One thing to keep in mind: Removing the DPF and/or EGR is illegal in some countries where you will be persecuted for tax evasion and driving without a valid license at the very least. So make sure the modifications you plan on doing are legal in your country first.

[@Roosko.1]

my 08 e82 n47 is still pulling like a train after 161k (uk, so thats miles) and still haven't changed the Timing chain, I change the oil and filter every year in Jan from when i brought it in 2017 :)

[@STUARTHARRIS-h4h]

Isn’t removal of the dpf system an mot failure ?

[@curioussand1339]

I have an E61 525d LCI from 2007 Steptronic with what corresponds to 220.000 miles on the clock. Still on same timing chain and turbo. I have both the EGR and DPF fitted. However I do all service myself with more frequent oil changes than recommended and also, cleaning EGR system including intake manifold regularly (every around 50.000 miles). I have had the car for 6½ years now and being driving nearly 100.000 miles out of the 220.000 miles myself. You need to be able to maintain a car like this yourself or it will not last and it will ruin your budget.

[@GeorgeAusters]

👍🏻

[@eliotsalandybrown]

Really instructive and helpful video many thanks 🙏

[@GeorgeAusters]

Glad it was helpful!

[@Rostymakesvideos]

My dealer quoted me a little over $10,000 to do a timing change job on my 535d.

[@stevo82e30m3]

Helpful alot

[@ronalbreit5123]

Another video full of good info

[@GeorgeAusters]

Thanks Ron!

[@linkoji9096]

use engine oil grade c3 5w-30 is it ok with N57 ?

[@LeeFall]

how does soot get in the intake...? its a vacuum?

[@valeriodeangelis7126]

After removing the egr and the dpf and cleaning the intake manifold, do you think the carbon deposit will be fewer ? Thanks

[@delz09]

Is it not an MOT fail to delete the egr and dpf?

[@stevemitchell5599]

Yes it is. Not great advice to remove them

[@azzamehmet]

Sorry mate new to n47 life. How hard is it too remove dpf? I’m ok with mechanics can do a little bit.

[@Koloxwy]

No worries, nobody will stay a long time with a N47

[@lawrenceburls4673]

Hi i have a 2016 535d with full service history and 40.000 miles on it .whats your thoughts on a stage 1 remap?

[@DanielleAusters]

Good video 👍🏼

[@smamas114]

My cranck pulley failed and i replaced the belt and tensioner wheels (Y) and i have to change the glow system relay

[@Prozacel]

Hi George! I have already changed my time chain kit at 180k km and now i have 280k km... when you recommend to change it again? Thanks man!

[@biggur5]

Isn't dpf and egr delete illegal and mot failure?

[@taz8436]

I have n47 I only recently baught it recently I've noticed on start up from cold it's got a slight rattle lasts about 3 to 5 seconds after this is pretty normal . Garage are saying it's normal what do you . Your videos are great and you seem to know these cars well thanks in advance

[@Ronnyy_79]

Ive changed rolls , tensioner,belt and all filters plus new oil on my n47 f30 but not the pulley.. simply just froggot and didn’t knew that this breaks a lot new parts caused my pulley to break wich did a lot of damage the car… when my pulley broke at first did not know and drove to mechanic like 5/6miles away. when I was driving my car did not have power at all just drove on a battery Turned out when pulley broke oil got heated up and get to turbo (had to regenerate) air intake , intercooler, exhaust system , dpf egr :((

[@hugorodrigues7176]

More one no problems

[@danbridger6837]

Do you have a link for the egr delete and your dpf delete? Please

[@GeorgeAusters]

The videos are on my channel, just search for them👍🏻

[@smamas114]

So fat on my 520d 2008 i ve replaced the big pulley ,the tensioner and accessories belt, oil pan gasket,the battery ,the coolant ,the brakes fluid and next is the alternator because sometimes doesn’t charge the battery,the servo fluid and i hope in the summer to get the timming chain and gearbox oil changed 👍

[@wass006]

George, do you know much about the bearing failure on the N57?

[@GeorgeAusters]

I would say its largely down to lack of oil changes and or not letting the engine warm up before thrashing it

[@OmariLiveHD]

Wont it fail an MOT test with the EGR and DPF removed?

[@FrankieFItness23]

So how did you find somewhere to mot the car with no dpf that is the only thing stopping me

[@GeorgeAusters]

Passed no problems.. As long as it looks like it's in place it should pass

[@European-ye7ne]

ive seen a video in spanish where the mechanic says that he thinks that the problem with the n47 engines is the design of the engine itself, not the maintenance

[@GeorgeAusters]

It's not

[@Axu_02]

Hi George! I just disabled EGR by programming on my 2012 e91 320d so it physically is in place but the valve is programmed to stay closed. DPF will be let in place because in Finland they may start measuring counter pressures in MOT tests.

[@Axu_02]

Hi George again! If u have time, could u answer me please: is it wise to remove swirl flaps on N47 after EGR programming?

[@damienpuljic1535]

How did you manage to disable the EGR valve - what software or tool did you use?

[@Axu_02]

I went to a BMW specialist. 50€ and 30 mins and he disabled the EGR valve by coding something with computer. I think number 1 was changed to 0 that the valve is closed all the time. @@damienpuljic1535

[@BackStabberJeff]

Hello mate , if you have a service please tell me where you are located 😊

[@xlt6599]

Can you recommend who can change timing chain for 1k like you mentioned

[@pytonirfan]

Where did you buy the kit and plug for the EGR Valeve remove

[@GeorgeAusters]

Watch the EGR delete video

[@axuli99]

Can i take the belt off and run the car without it? I want to check if a weird sound is coming from one of the pulleys

[@GeorgeAusters]

Yes you can

[@axuli99]

@@GeorgeAusters I've had the infamous swishing sound for 3 years now and i've been kinda worried it's the chain. It's been getting much worse this autumn and today I finally got up to checking it by taking off the belt and the noise is completely gone, no swishing sound. The belt itself was from 2008 and so is the car so the pulleys are likely original too. Bought new tensioner, delfection pulley and the belt and gonna change them tomorrow. Hope this fixes it.

[@joeyjones6638]

Well said George 👍👍👍

[@GeorgeAusters]

Thanks Joey!

[@shaunsmith3660]

Tell us how you get round the MOT...few have asked and that's probably what's stopping most people from doing it, I know you can gut the dpf and it's only a visual inspection but what about the egr?

[@TheWebstaff]

Yeap dvsa have a real issue with this mod. If they stop you it not to much of an issue though. You just have to refit all the bits you've removed before you allowed to take your car away.

[@smamas114]

Is it 15v too much from the alternator ??

[@chrisstorey8250]

When removing the EGR and swirl flaps and you don’t get it tuned out asap will this flag a light on dash but can be driver still for a short time ?!

[@oscarorme3615]

Not going to talk about that in this video though * proceeds to talk about the timing chain issues *

[@Dremansworld]

How do you remap the software after the deletes?

[@GeorgeAusters]

Take it to a tuner

[@johnmclaughlin7455]

Hi George, if the EGR is removed will that have an effect on the emissions test at the MOT cheers

[@cranitdans]

I wouldn't worry about that. I have egr mapped out and it didn't fail.

[@chanota7]

Psoy propietario de un 325d e92 , cadena kit cambiada a los 27000 por distensión, y ahora con 200000 otra vez ruido!

[@francisrobertson-marriott7868]

George, great work here. Just acquired a 320d 2009 with 78k on the clock. The swirl flaps have immediately thrown a wobbly so trying to decide on whether to go down the delete route or not. Anything else you would recommend I tend to whilst I’m going to be digging around in the engine bay? Thanks

[@leenevin8451]

does removing Cats help with power a lot?

[@drxcu]

Is it even legal to drive around on the roads with an EGR / DPF delete? As far as I know in Germany n47 cars without egr or dpf will fail emission inspection tests (every 2 years). No emission inspections in the UK?

[@GeorgeAusters]

Passes emissions absolutely fine!

[@MrTallAndy]

Will it pass an MoT with DPF and EGR delete?

[@GeorgeAusters]

Should do!

[@kieranb818]

What about mot's? I really want to remove my dpf just worried I can't get one

[@GeorgeAusters]

I’ve never had an issue on MOT

[@kieranb818]

@@GeorgeAusters I'm doing it going to pick a dpf delete later

[@uklmngubane5661]

Thanks_links to time chain kit

[@GeorgeAusters]

You're welcome!

[@AsusRogStrix]

I have a 2007 n47 car and I have electric power steering ... how come ?

[@GeorgeAusters]

Electric power steering was an option from factory 👍🏻

[@TheUniCyCliSt]

Part of BMW’s efficient dynamics improvement to increase mpg. Electric power steering means no extra auxiliary load on the engine when driving in a straight line.

[@joaomarques7533]

I would like to have your opinion on a BMW 123d double turbo engine which is what i will be swapping after my seat Ibiza 6L 1.4 tdi 90hp

[@GeorgeAusters]

Same engine just 2 turbos

[@georgievvladimir]

After "get rid of the EGR" job should we modify the software of the car in some way ?

[@Larry-ix8ex]

I can Abrove all ...Well done

[@mikeg1014]

Great video mate, thanks for all the valuable info, just picked up a x6 m50d f16, so this info is priceless, defo will do a egr delete and dpf..

[@GeorgeAusters]

Welcome mate!

[@theoneandonly8567]

Remember it is illegal...

[@ryanjames2962]

Have a Cooper SD with an N47 engine... is it the same to take the intake manifold off to clean as you have shown on yours?

[@GeorgeAusters]

Very similar yes👍🏻

[@kozmaz87]

I have a 2012 Cooper SD that uses the N47C20A variant of this engine. I already have done the whole pulley set overhaul at 8 years and about 80k because it was cracked all across but of course that needs my sporty driving style. I am very strict on the maintenance schedule and I put in the appropriate oil such as ACEA C3 and BMW LL-04 and my favourite variety is the 0W-40 viscosity. Beyond that make sure you have one of the BMW specific OBD scanners at hand such as the Carly BMW that is pretty ok and you can monitor many things that the car is getting up to. So far there is no rattle and no position sensor reading wobble associated with slacked timing chain is present on my car. So far so good. But yes with these cars, they are a ton of fun but if you had the money to buy a monkey that may be fun but do not forget to supply the bananas :)

[@ryanjames2962]

It’s a 64 plate R58 coupe... extremely fun to drive and it’s a second car, so we don’t do many miles in her (holidays / weekend fun). Have a suction tool and am either changing the oil and filter every 6k or 6 months, then letting garage do proper oil drain at service time. My only issue is I’ve not found an updated clutch, so don’t want to go made with a remap :(

[@ryanjames2962]

@@GeorgeAusters excellent channel, please keep up the good work... if you want to feature a strip down on a the Mini variant give me a shout and you can clean mine ;)

[@floriantotaj992]

One question, if you remove the EGR and DPF, will the car have black smoke from behind when you floor it

[@GeorgeAusters]

Not if mapped properly and the engine is healthy

[@davson1276]

I’ve recently got my chain replaced, the crank vibration damper was extremely lose. Runs like a dream now 😌

[@kat0197]

Hi and thanks for another great video. Can you tell us pls if Software turn off EGR is basically same what is remove it phisically.??

[@WillowGTI]

I've read that closing it with software is the better option. That's what Grosvenor in Reading recommend. They are a very highly respected BMW indy.

[@PG_FISHING]

What do you reckon about remapping? I've seen mixed opinions? I've a n57 and im considering remapping for a bit more power, will it cause problems later down the road?

[@Call_Centre_Conversations]

my one is remapped at 165,000miles, now at 293,000miles now

[@mikeoxlong1434]

If i map the egr and dpf out can i still leave them on the car or do they need to come out once mapped out Thanks in advance