BMW E90 E92 E93 M3 injector change guide - Should you change them before they fail??

In this episode of project e92 M3 you join me changing the fuel injectors and the reasons for changing them before they fail even with no faults registered..
Link to the owners club where the debate continues -
forums.m3cutters.co.uk/thread...

[@brianthompson7587]

Thanks for the info and guide, I obtained 8 new Bosch injectors same part as yours, from the States and fitted them to my 91k M3 E92 yesterday - didn't have any previous problems with the injectors but now happy new one's are in. As an aside, I have to say the car really runs better now in general and feels cleaner in the way it revs and idles....so clearly the old injectors (although working ok) were worn or past their best, as you'd imagine at 91k anyway. I had previously used injector cleaner regularly and only quality 99 fuel, so the fuel system was in tip top condition. Given the reasonable cost of doing this job (my injectors cost about £280) I'd say this is a no brainer for anyone with a higher mileage M3 E92. It is a bit concerning that there is no fuel filter as a service part on this car which also strengthens the case for doing this preventative maintenance .... we must keep more E92 M3s on the road - that engine will need be repeated and is a true naturally aspirated masterpiece and these cars are starting to go up in value....no surprise perhaps. Thanks again for the video guide.

[@stoneautomotive]

Glad to hear the video helped Brian 👍 I also noticed improvement in the running but more so in the idle than the upper RPM and yes for the cost it’s a no brainier to change them. Agree, we need to enjoy these naturally aspirated 8,600rpm times 😎

[@eja144]

Great video - saved for when my new injectors arrive! With S65 parts getting more expensive and scarce, I figure it can’t hurt to replace them preventatively. I sadly missed the boat on ignition coils and now they’ve tripled in price.

[@stoneautomotive]

Glad you enjoyed 👍 Agree everything has increased in price for these, I’ve had a few subscribers comment saying the injectors have gone up considerably since I made this video!

[@markhughes3174]

Great vid, cheers man, just did my injectors 2 weeks ago, timed it when I was fitting the Eventuri 👍🏻 I was the same mindset as you, I know I’ve looked after her during my ownership but hard to know what fuel was run for many of the early years... better safe than sorry

[@stoneautomotive]

Glad it helped Mark, bet it sounds good with the Eventuri fitted 😎

[@richatkinson989]

Doing this today, so good to see this video first, weirdly this video is not in the m3 playlist 🤷‍♂️

[@stoneautomotive]

Odd it wasn’t on the e92 playlist! Not one of my greatest videos but hopefully helpful 😎👍

[@roymoorman5990]

Thanks. I'm a bit hesitant to replace them. On the other hand, I've had two cutouts already after going to 8k and upshifting without loss of traction and DSC light didn't flash, no DTC stored. It was not on the highway. What usually happens with the injectors failing AFAIK is that you get detonation which destroys a piston at the outer edge or burns a hole into the middle.

[@stoneautomotive]

The DME in the e92 M3 is very advanced with ignition timing, if detonation is noticed it will drastically pull out ignition advance = low power (thankfully the days of carb engined vehicles are long gone with holes in pistons but incorrect mapping can obviously still cause it) I’ve not seen any injector failures on the S65 that cause piston damage from poor spray pattern etc just sticking fully open and causing big failure as a result of hydro locking the engine with fuel ☹️ I hope in time some one will be able to work out the fault, my Clio 172 Cup is on 134,000 miles with original injectors and my Honda S2000 on 147,000 miles on original injectors with no issues where’s the M3’s have been failing as low as 30,000 miles

[@Action_Balser]

Just finished this job today, thanks for the video! 474$ CAD for the new Bosch injectors and about 2 hours work. Worst part was getting the clips off the old injectors lol I noticed the same changes as you, very slight roughness at idle, but not enough to register a fault code, gone after changing.

[@stoneautomotive]

Glad the video helped Rob & glad you noticed a difference 👌 clips are not to bad when you’ve done it a few times 😅

[@manvsmachine1]

Where did you get them for 474 CAD?! Please share link. :)

[@Sam_AMG]

Great video! Just read on m3cutters that someone's injectors failed and the car had just over 38k on the clock.

[@stoneautomotive]

Thanks Sam, yea seen that post this morning ☹️

[@Sam_AMG]

@@stoneautomotive my car has 47k on the clock but I think I'll be changing them as well. They're not too expensive to buy. It would have been better if I could get the same deal as you did though 😄

[@stoneautomotive]

Yea few of us managed to jump on the $25 a piece units 😅 as you mention it’s not end of the world cost especially vs the repair bill if they fail

[@bradoncodblackops]

Happened on my s85!! Luckily saved the engine... They did last 155,000 miles though!

[@stoneautomotive]

Been a big issues on the S85 too 😩

[@michaelcheung8500]

I bought some secondhand oem bmw injectors in working condition I was told which they did flow within 4/5% of each other but there was two injectors that was leaking so I had them all ultrasonic cleaned 4 times and flow tested two times till each one was good. This goes to show you how much crap goes through the fuel lines and into each injector. I’ll be fitting a fuel filter from areeve

[@stoneautomotive]

Sounds like the e92 M3 is going to be just like the M5 with injectors almost becoming a serviceable item. Certainly be interested to see where the new filter will be fitted - keep the thread updated I’ve linked in the description 👍 Ps - would it not have been cheaper to have just purchased new units rather than a second hand set and ultra sonic cleaned/ flow tested?

[@michaelcheung8500]

@@stoneautomotive I was lucky to get them very cheap so I took the gamble to get them cleaned and tested.About the fuel filter I spoke with areeve and they said they don’t know when the fuel filter stock will be available?

[@isaaciiiboii]

Happened to me on my E90 M3 93k miles, half a tank flooded engine, hydrolock bent rod, bore wash too. Full rebuild with cylinders needing sleeving. All rebuilt and now running, more new injectors on the way.

[@stoneautomotive]

☹️ Glad to hear you got it all sorted in the end 👍 if you don’t mind the ask could you confirm the country you live in and the fuel used? Trying to build enough details to confirm if it’s related to a year or fuel being used.

[@isaaciiiboii]

@@stoneautomotive UK mate, for the 2 years I’ve had it always used either Shell V-Power or Tesco Momentum, more Tesco tho and still use the same fuel now as I don’t think it’s related. I think the S65 injectors are starting to go due to age/higher mileage, I think the S85 was more common because they were produced 2005etc they had higher mileage and age, but now the S65 is catching up thus the injector problem. I’ve heard people say replace them every 50k miles and you shouldn’t have to worry.

[@stoneautomotive]

Agree, think we just have to accept it’s a replaceable item

[@ElliotsM3]

Mines @ 69k my todo list is -Bearings end of this year - go over rear subframe and bushes And now injectors 🤦🏻‍♂️ 🤣 I would do this my self but it took me ages getting the plenum back on when I got a carbon one. Maybe next summer I’ll give it a shot 😂

[@stoneautomotive]

Yea I would like to do rear subframe bushes too, seen so many with rusting subframes now it would be nice to remove/strip/ re-powder coat The plenum removal/ refit is not too bad once you’ve done it a few times 😬

[@ElliotsM3]

@@stoneautomotive came out easy but getting back in wow ahah very fun! next summer job i think. i got my plenum from carbo project. i think a new sub is like 1500 then plus all the labour. did have mine up the otherday and didnt look too bad

[@Tune2Race_]

I’ve just had a new engine built due to a main bearing spinning and destroying the bottom end and there was another e90 m3 there that had suffered an injector sticking open and one of the rods was hanging out of a massive hole in the block 😳🤦🏼‍♂️ safe to say mine had a brand new set before the new engine went in!!..

[@stoneautomotive]

Sorry to hear but at least you have done the injectors now so fingers crossed it’s trouble free ownership on the new engine 👍 It’s certainly a real problem for the S65..

[@Assimilator1]

Interesting video, I recall finding a few cases of injectors killing engines in the M3post forum (the 'blown motors' thread, I did a clean up of the list later on btw), I wondered about replacing them myself on my own M3, and a few of us discussed whether we were going to replace them or not. I decided not to (so far, lol) as it was so rare (3-4 at the time IIRC). The current count in the aforementioned thread is 6 engines killed by injector failures, but I haven't gone through your m3cutters thread yet to see if their are any new cases (new to m3post, but probably are. Oh, JFYI, I use the same name in m3cutters and m3post as I do here). You mentioned a FB M3 group in your forum thread, is the it the UK M3 group? (I'm already a member of that). Also, is there a 'thread' there tracking how many S65s have been damaged by injector failures? Btw I don't buy the idea that dirt gets past the fuel filter and knackers the injectors, most petrol cars now (and for many, many years) have had in tank fuel filters, injector failure of this kind is not rife. Also, the whole point of the filter is to stop the dirt getting through! Like you, I think it's down to some kind of internal wear (or failure) in the injector.......hey, at least we agree on that! 😉, even if we don't on the fast cold idle thing! 😂

[@stoneautomotive]

I’ve seen the page on M3post (I was linked to it by a subscriber) nicely organised but I feel that forum is home to more users in the States than UK to gauge how many failures have occurred (I think many are also not proud to declare the failure as a replacement engine doesn’t do wonders for vehicle resale so often kept hush hush) Yep the Facebook page for the e9x M3 group is the one I was referring too, I’ve seen a few cases on there but sadly it doesn’t sit in one post you would have to go through various pages to group them all together. I had a chap on M3cutters post advise that he believed it was just more specialists making money than a real issue, he messaged me advising he then suffered injector failure destroying the engine and wished for the small cost for a set of 8 that he had changed them.. Glad we agree on something 😅 the filter solution just doesn’t make sense at all as you wouldn’t have just one injector fail it would be multiple units if something had contaminated the fuel system. PS for the cost, get them change, some chap on KZbin called Stone Automotive made a guide 👀😅

[@Assimilator1]

@@stoneautomotive lol 😁 Yea M3post is mostly US users, but seeing as they have a greater number of M3s there it's still relevant, even if their petrol is a little different.

[@Poplavchik]

Hello. Very nice video. What mileage you bmw ?

[@stoneautomotive]

Thanks 👍 - 2011 model - 74,000 miles

[@begicbros.motorsport]

joust fixing one e92 m3 came with one injector stuck open , changed it and after 30 km same problem but another injector , took sample of fuel directly from rail and it is full of metal particles that are actualy destroying injectors

[@stoneautomotive]

That’s not good! Had something failed in the fuel pump? Most cases appear to have one injector failure & the rest okay. I hadn’t had any faults with mine but changed for peace of mind (hopefully no issues ahead)

[@begicbros.motorsport]

@@stoneautomotive the fuel pump is my gues due to it is only metal part in system

[@stoneautomotive]

Hopefully you get it sorted, expensive day out if it destroys the engine ☹️

[@micraw714]

I'm both happy and sad that I watched this video lol 😆 I'm at 67k in my 08. I think I'll swap them around 75k just to be safe 😁

[@stoneautomotive]

😅

[@clem_M3]

Hello, do you have any information about ignition coils? I can only find bmw now. bosh and others not found

[@stoneautomotive]

Yes - purchase genuine BMW only 😅 Had an issue on mine with a Bosch unit

[@clem_M3]

@@stoneautomotive oh 😭 I tested the hp ignition and one was faulty right from the start. I sent it back and I read reviews that talked about 20k-30k km hs. I had a fault on the left bench I changed a coil in origin the one that came back to the diagnosis, is it necessary to change the complete left bench or the 8 I had nothing on the right bench.

[@clem_M3]

@@stoneautomotive oh bad for you too🥲 I tested the hp ignition and one was faulty right from the start. I sent it back and I read reviews that talked about 20k-30k km hs. I had a fault on the left bench I changed a coil in origin the one that came back to the diagnosis, is it necessary to change the complete left bench or the 8 I had nothing on the right bench.

[@Lowcollective]

What about changing the crap filter? Or run an inline one

[@stoneautomotive]

Personally I believe it’s a component failing in the injector itself, if the filter had gone bad you would have multiple cylinder failure - in every case I’ve seen so far it’s been just the one failing

[@Lowcollective]

Yeah true, but I've not seen one fail shut. Better to be safe I suppose. Keep up the good work dude

[@DLau95]

Do you push in the injectors back in fit or it sits and fit perfectly once the rail bolts are on?

[@stoneautomotive]

They should push back in 90% of the way and then the fuel rail bolts will pull them into the final position 👍

[@DLau95]

@@stoneautomotive thank u

[@DLau95]

Do you clean the area where the injectors sits on the engine? There’s bits and dust on it.

[@stoneautomotive]

@@DLau95 I would consider a vacuum cleaner as trying to wipe or spray cleaner will move it down the inlet track and potential damage the valve seats/ piston rings & liners. Mine were clean thankfully

[@lekso]

Do the injectors need to be reprogrammed after replacing them?

[@stoneautomotive]

Nope, plug & play if using the same ones as factory 😬

[@lekso]

@@stoneautomotive I replaced two injectors with Bosch and lasted about a week! I just ordered the factory one and wondering if I need to code it.

[@stoneautomotive]

You either purchased fake ones (really common on eBay) or you have contamination in the fuel system that is destroying the injectors. Get the system checked before installing any more as you’ll destroy new BMW ones if there’s something bad in your fuel tank

[@oneginee]

This rare issue is clearly due to the high revving nature of the engine and would be proportional to how much use is spent at redline. It's next to impossible to drive on public roads in those conditions over long stretches and would only be a thing in track days. So i don't see this as an issue for 95% of E9x M3 owners who will only redline on specific sporadic occasions, not on every straight stretch of the road. There's paranoia around this engine which is overblown which i think Bmw did a poor job to dispell as they never quelled the infamous RB MB issue with their manufacturer point of view info to reassure owners. Because of this there's a tendancy to worry too much about this engine and do fearmongering preventive replacement that is not needed. There's actually people from this community who saw the opportunity for a quick buck business and are using psychology to sell their miracle fix part which makes no difference. I go back to 2008-2013 i know this engine history already at the time. As a long time owner of this car (i factory ordered mine and took delivery directly in Munich), my rating is that it was designed like a superstar with huge ambition from the true M division engineers (a thing of the past) and then ( due to the 2008 financial crisis) saw Bmw downsizing M division and merging it with the regular 3 series and ignoring reliability issues of owners. Unlike Porsche i think Bmw has a poor support and follow up from the manufacturer on their performance cars. Instead of helping everybody they tend to only help does who sue them or threaten to. They tend to turn the page and focus on the next generation model and completely abandon current owners. Overall i like the car but not the bmw brand and corporation. I like Japanese brands much better as they design with customer ownership in mind, making sure nothing will disappoint for years after the buy and if something does they will not sweep it under the rug like bmw does.

[@stoneautomotive]

Well said 👍 agree the forums don’t help as you always hear of the bad things before the good but at the same time I’ve seen and know people with rod bearing and injector failure on road cars so it was enough to convince me to get them changed 😅 Also agree with the BMW after care comment, really not great and cars are certainly not built like they used to be from them in terms of reliability ☹️