Fuel injector gone bad - leaking

[joeo]

Diagnosed a leaking fuel injector on a 2009 BMW 135i. All the injectors on the car are 1353 7585261-05. As I understand it, I can replace the one bad injector, but I need to program the computer with new values?

Does anyone have any more detail? Can the newer injector part number be mixed with the older part?

Thank you!

-Joe

[ryan.ferguson]

BMW states you should replace the injectors in sets of 3 (part# 13538616079), not individually, you also need the decoupling element (part# 13537564751)

[joeo]

So if injector 2 is bad, I need to replace 1,2 and 3, but can leave 4,5 and 6 using the old part #?
Also looking at this thread:
http://www.e90post.com/forums/showthread.php?t=651538

[joeo]

Anyone know what happens if you replace just one?
Thanks.

[rocketpop]

You can not mix old model injectors with new model ones in the same bank. I replaced 1,2 and 3 with the new model but 4,5 and 6 are still the old model.

If you can fine the old model then you can just replace the one bad one.

[joeo]

What happens if you do?

[joeo]

I've replaced just the single injector without issue (N54 engine). Before I replaced the injector, I was getting code P2097 - post catalyst fuel trim too rich in bank 1. Other symptoms were misfire in cylinder 2; I moved the coil packs around and still had misfire in cylinder 2. Pulling out the spark plug in cylinder 2 revealed a plug soaked in gasoline.

After replacing the injector, and setting the injector values in the engine computer, I got the P2097 code again. I deleted the adaptation values for the lamda flow and drove the car on 4 trips so far without any check engine light. The engine runs smooth and power is normal.

The old part number was 1353 7585261-05
The new part number is 1353 7585261-12

I bought the injector from getbmwparts.com and the OBDII cable from tmart (http://www.tmart.com/Interface-USB-O...W_p101210.html). I used instructions from [Admin Notified] (for some reason I can't post the link here - it's replaced with ******):
[Admin Notified]/showthread.php?20330-DIY-N54-Injector-Coding-Via-INPA

-Joe

[JimUlrich135]

You can just replace the one, but it has to be same last two index numbers(05) and will have to be married to the DME via dealer. Not a diy at home unless you plan to have towed to the dealer afterwards...replacing an injector should just be done at the dealership.

[joeo]

No issues after replacing just one injector - it's been about 6 months now.

[kfrazie1]

Originally Posted by JimUlrich135

You can just replace the one, but it has to be same last two index numbers(05) and will have to be married to the DME via dealer. Not a diy at home unless you plan to have towed to the dealer afterwards...replacing an injector should just be done at the dealership.

It's actually very straight forward to diy if you are handy and have some decent computer skills. The injector isn't exactly married to the DME. You just have to by a Cable and download INPA to change the injectors flow calibration values. Easily done by an enthusiast but not your average consumer.