DTM-118111 Mixture Control 2- Injector Replacement!

[JoeKhoda]

When I first bought my beloved M5, it was amazing. The previous owner told me he had the infamous "Drivetrain Malfunction". He had the plugs, coils, fuel pumps replaced under warranty.

Performance Mods include:
ESS High Flow Catted Downpipes
Acrapovic Exhaust
MSR Intakes
ESS Stage I tune

All seemed great for a while...Then this happened:



Great.. Now the troubleshooting begins...

Downloaded codes and get this




Reset ECU to stock and problem eventually came back so it wasn't related to the tune.

Decided to pull plugs and check for wetting.

Bank 1:


Bank 2:



Hooray! Leaky injectors..
After biting the bullet and ordering all new genuine injectors from FCP, I was on the website looking around and noticed the OE Bosch injectors were in stock at 1/3rd the price. Sweet, ordered those and sent the genuine's back. Before I sent them back, I did a side by side comparison to make sure I was good. I will note, I went with the original EU5 injectors.





Yep same same... Kind of weird that there aren't any caps to keep the o-rings from expanding... o well. On to the replacement!

Teardown






Finally got those buggers out.



Back Together!!


Reloaded the tune and all is well so far! About 1000 miles down now going strong!


If anyone has any questions, don't hesitate to ask! Fell in love with this car all over again! Thanks for reading.

~Joe

[Craze]

Did u program the dme for new injectors?

[JoeKhoda]

Originally Posted by Craze

Did u program the dme for new injectors?

You bet! Loaded via ISTA.

[technician117]

Thanks for the post and pictures. I have a feeling I will need to replace mine at some point.

2 questions:

-What is the blue anodized tool in the pics? Used for removal or install or both?

-Do you have to use ISTA P for the programming? I'd like to do the whole job myself but I only have an older version of ISTA D (goes up to 2013 models).

[JoeKhoda]

Originally Posted by technician117

Thanks for the post and pictures. I have a feeling I will need to replace mine at some point.

2 questions:

-What is the blue anodized tool in the pics? Used for removal or install or both?

-Do you have to use ISTA P for the programming? I'd like to do the whole job myself but I only have an older version of ISTA D (goes up to 2013 models).

The tool I used is the BMW (N63) FUEL INJECTOR REMOVAL / INSTALLATION TOOL NO. 224911 from KTC Tools. $99 on eBay. I couldn't have removed them without this tool. Reasonably priced and easily procured. Worth it. The Genuine BMW tool is a combination of 2 special tools, from what I interpreted in the TIS and they're not the easiest to get.

Per the TIS you are supposed to use for installation as well, but I just made sure they were fully seated prior to installing the hold down brackets.

I used ISTA-D version 4.x.x
Vehicle identification
Function selection
Service functions
Engine electronics
Adjustment functions
Injection quantity compensation.

I thought about doing a write up, but the TIS really explains it well. I can send a link if you can't find it.

[technician117]

Originally Posted by JoeKhoda

The tool I used is the BMW (N63) FUEL INJECTOR REMOVAL / INSTALLATION TOOL NO. 224911 from KTC Tools. $99 on eBay. I couldn't have removed them without this tool. Reasonably priced and easily procured. Worth it. The Genuine BMW tool is a combination of 2 special tools, from what I interpreted in the TIS and they're not the easiest to get.

Per the TIS you are supposed to use for installation as well, but I just made sure they were fully seated prior to installing the hold down brackets.

I used ISTA-D version 4.x.x
Vehicle identification
Function selection
Service functions
Engine electronics
Adjustment functions
Injection quantity compensation.

I thought about doing a write up, but the TIS really explains it well. I can send a link if you can't find it.

Excellent info, thank you. No need for a DIY write up beyond what you've already provided.

[JoeKhoda]

Originally Posted by technician117

Excellent info, thank you. No need for a DIY write up beyond what you've already provided.

No problem. If you run into any issues, shoot me a pm.

[Bimmma]

BMW has actually issued extended warranty on these injectors. Some of you may have gotten the letter last year. 10 yr/120000 miles.

[rickyf10]

Originally Posted by Bimmma

BMW has actually issued extended warranty on these injectors. Some of you may have gotten the letter last year. 10 yr/120000 miles.

Wonder if the extended warranty is available in Canada or just states

[Dumpspec]

Thanks for sharing. I also just got this SES on my car. I too also replaced plugs, coil packs and fuel pump. On my car I only get SES light with tune on and Car is fine without tune. I will probably reload tune and try to replicate the SES light before taking it in to get injectors looked at.

[PerfM5]

I thought the full fuel system was under 120K mile warranty. At least that what I was told by my dealer.

[Jasoneo5]

Originally Posted by PerfM5

I thought the full fuel system was under 120K mile warranty. At least that what I was told by my dealer.

Yeah, I've heard similar but I also assume there are a few issues with this:
1) Tuning void warranty
2) BMW only pays for the injector that failed, not the all of them
3) A failed/failing injector can bomb the whole engine which BMW wouldn't cover

[rickyf10]

Does “mixture too rich” triggers drivetrain malfunction message? I have exact same code but just CEL light on. DT error pops for rail pressure plausibility.
Workshop buddy told me it’s leaky injectors

[Dumpspec]

Originally Posted by rickyf10

Does “mixture too rich” triggers drivetrain malfunction message? I have exact same code but just CEL light on. DT error pops for rail pressure plausibility.
Workshop buddy told me it’s leaky injectors

mine came on without drivetrain malfunction.

[technician117]

Originally Posted by rickyf10

Does “mixture too rich” triggers drivetrain malfunction message? I have exact same code but just CEL light on. DT error pops for rail pressure plausibility.
Workshop buddy told me it’s leaky injectors

Very well could be. I wouldn't take any chances. If the injectors are original and you have a 2013 or older, I would replace all of them. AS mentioned above, BMW will only warranty change individual injectors that are determined bad. You could try that route to start and maybe save yourself the cost of 1-2 injectors, but probably not worth the hassle IMO.

The reason I say to not take chances is leaky injectors can cause hydrolock and a rod through the block or simply a bent rod but that's still the same end game... new engine.

[gary_F10M5]

Originally Posted by JoeKhoda

You bet! Loaded via ISTA.

Hi OP, do you need to do a DME adaptation reset after changing and registering the injectors? Thanks.

[Dwaynos]

Originally Posted by technician117

Very well could be. I wouldn't take any chances. If the injectors are original and you have a 2013 or older, I would replace all of them. AS mentioned above, BMW will only warranty change individual injectors that are determined bad. You could try that route to start and maybe save yourself the cost of 1-2 injectors, but probably not worth the hassle IMO.

The reason I say to not take chances is leaky injectors can cause hydrolock and a rod through the block or simply a bent rod but that's still the same end game... new engine.

So injectors should be replaced even if there are no issues? My car is a 2012 with 51k miles.

I dont mind a bent rod but dont fancy a rod through the block. Rods are "easily" replaced.

[M5Rick]

Mines a '13 with 35k miles and I don't think there is reason to panic and replace all injectors.
The original injectors were tested to maximum before car was released to the public and I'm still in the dark about what injectors you should replace them with should you want to go ahead for just peace of your own mind.Someone in NY had a replacement engine and he's saying THAT engine failed because of wrong injectors fitted...

[technician117]

Originally Posted by Dwaynos

So injectors should be replaced even if there are no issues? My car is a 2012 with 51k miles.

I dont mind a bent rod but dont fancy a rod through the block. Rods are "easily" replaced.

Not necessarily. I recommended it to the poster because he claims to have leaky injectors. If their leaking, replace ASAP.

[technician117]

Originally Posted by M5theonlyone

Mines a '13 with 35k miles and I don't think there is reason to panic and replace all injectors.
The original injectors were tested to maximum before car was released to the public and I'm still in the dark about what injectors you should replace them with should you want to go ahead for just peace of your own mind.Someone in NY had a replacement engine and he's saying THAT engine failed because of wrong injectors fitted...

If I remember correctly, the problem with the OE injector is that they get stuck open or start leaking pretty easily. On a direct injection engine, this can cause catastrophic failure. AFAIK they updated some materials or design for the replacements but kept the same part number for the early cars.

[charlis777]

most of your injectors came out with the decoupling elements attached to them. how did you manage taking other ones out i'm kinda struggling getting them out

[5soko]

So for installation you just pushed the injectors down into there vallets and then bolted them down?

I know TIS says to use the toll for install but doesnt really make sense, i figured you can just push them in and bolt them in as you did and it will be fine.