BMW 335i 2009 - injector issue - help please

BMW 335i 2009 - injector issue - help please

Author
Discussion

kitegirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
HI PH-ers,

With the demise of BMWland I need to call upon your vast wealth of experience for help please.

My 2009 335i has gone in for a service. Has a misfire fault which I knew about, it finally threw up an engine management light so they got a code, coil and spark need replacing on one cylinder - fine.

REplaced - re-diagnosed, and now computer says all 6 injectors need replacing. Erm - ok.

RAC Warranty company apparently won't cover the injectors as they consider that wear and tear (at 74,000 miles?) and I'm loathed to spend the ridiculous amount of money replacing them, for their computer to then say 'oh sorry - wasn't that, now it's this'

so questions. Are injectors a known issue on the 2009 335i's? And should my warranty company not cover that?

And if you're a magician, will this fix the fault?

Thanks in advance.

SuperchargedVR6

3,138 posts

219 months

Thursday 23rd July 2015
quotequote all
Does the engine run currently? The ECU thinking all 6 injectors are faulty is quite drastic, but if it's running normally, it's probably a wiring issue confusing it.

Dannbodge

2,160 posts

120 months

Thursday 23rd July 2015
quotequote all
In short answer to your question.

Yes they are a known fault on the 335i.

If you had the BMW warranty they would replace them for you, why the RAC one won't I don't know.

Limpet

6,292 posts

160 months

Thursday 23rd July 2015
quotequote all
Does the computer say all 6 injectors need replacing, or is just that it has given some information that a technician has interpreted in that way?

Fault codes don't tell you to replace things generally, but pinpoint where an issue may lie. I would be astonished if six injectors have all failed at the same time.

kitegirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
No idea the unhelpful service lady knows nothing about cars but said computer says all 6. If it's a known issue on this engines can someone point me to some evidence if they have any then I can take that up with BMW. It's only been misfiring at cold it's fine when warm so I'd be surprised if it was all 6 too.

kitegirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
Also - is this potentially a symptom of the HPFP failure?

Dannbodge

2,160 posts

120 months

Thursday 23rd July 2015
quotequote all
There is a known issue as they even did a recall.

http://www.e90post.com/forums/attachment.php?attac...

kitegirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
Thanks Dann - superstar. Mines 2009 but i'll call bmw and check what engine it has.

Smuler

2,286 posts

138 months

Thursday 23rd July 2015
quotequote all
I'm a 2009 (59) and yesterday had all fuel injectors and buffers replaced. It's N54 engine, yours will be the same. I have AUC warranty, 71k miles. It was accepted as fault, not wear and tear.

kitegirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
Thanks guys. Just did the online vin check and it's an N54. Will go in with some print outs and an angry face tomorrow.

FTBBCVoodoo

64 posts

106 months

Thursday 23rd July 2015
quotequote all
I just had the injectors replaced on my 2007 E90 335i under a recall while it was in getting the turbo's replaced (which were under warranty).

Would double check with another BMW dealer.

Ninjagirl

Original Poster:

18 posts

203 months

Thursday 23rd July 2015
quotequote all
What's more annoying is the warranty company deciding they won't pay as they think it's wear and tear. Will fight with them first and if not I'll speak to the dealer about the recall.

Thanks for all your help.

Smuler

2,286 posts

138 months

Friday 24th July 2015
quotequote all
Good luck, and from the change of username it seems you're ready for battle. However, if all the injectors need changing it may be better you also contact BMW and simply get it done, otherwise you could be without a car. A ninja in a 335i, that I can picture. But a ninja driving a 1.2 litre rental car, no way wink

Ninjagirl

Original Poster:

18 posts

203 months

Friday 24th July 2015
quotequote all
Smuler said:
I'm a 2009 (59) and yesterday had all fuel injectors and buffers replaced. It's N54 engine, yours will be the same. I have AUC warranty, 71k miles. It was accepted as fault, not wear and tear.
Hi smuler - can you let me know where you had that done please, as BMW are saying it's not a known issue with mine

Ninjagirl

Original Poster:

18 posts

203 months

Friday 24th July 2015
quotequote all
got your mail, thanks Smuler.

Ninjagirl

Original Poster:

18 posts

203 months

Monday 27th July 2015
quotequote all
SO - small update.

As all 6 have failed the warranty co are saying the injectors are end of serviceable life. They won't pay up. If 2 or 3 had failed they would but they're not interested if all 6 have.

BMW are saying they're not EOSL they've failed, there's no known issues with the piezo injectors on the cars of this year (there were with the 2 years before though) so they're not covered by any recalls etc.

Big bill for me then frown

Smuler

2,286 posts

138 months

Monday 27th July 2015
quotequote all
Ninjagirl said:
SO - small update.

As all 6 have failed the warranty co are saying the injectors are end of serviceable life. They won't pay up. If 2 or 3 had failed they would but they're not interested if all 6 have.

BMW are saying they're not EOSL they've failed, there's no known issues with the piezo injectors on the cars of this year (there were with the 2 years before though) so they're not covered by any recalls etc.

Big bill for me then frown
You can slice me with Ninja sword, for possibly being thick, but in your first post the diagnosis was that all six should be "replaced" and not that all have "failed." Could there be a difference? My "failure" codes were on numbers 1 and 2 but I had them all "replaced," similarly after two singular injector failures on my E46 I had all 6 replaced, as common sense. Might be worth a check, with whoever performed the original diagnosis. Because if they confirm it's not a complete failure, then the warranty company can be challenged wink

Plus, I would still challenge the warranty company anyway and when was your car built? It seems it's going to be pretty close to the recall period in the sheet Dann posted. Worth pressing BMW customer services?







Edited by Smuler on Monday 27th July 11:53

stuart-b

3,643 posts

225 months

Monday 27th July 2015
quotequote all
Ninjagirl I have an N54, but the N45T which is almost the same but the 1M engine. I did a lot of research on potential issues with the fuel system. The most common issue is the HPFP (high pressure fuel pump) causing misfires and cold start problems. There is even an upgraded one by BMW and third parties also released some for the tuner world.

http://www.bimmerfest.com/forums/showthread.php?t=...

In the US the HPFP now has a 10 years/120,000-miles warranty. "BMW has released a replacement pump with a part number ending in -943. The replacement pump may solve the problem."

See here a complete DIY and place to buy the parts: http://www.e90post.com/forums/showthread.php?t=654...

You can also download an app for your phone, if you buy the USB cable and OBDII socket too you can log/view the errors yourself - then speak to more knowledgeable people on the forums or a BMW indi specialist (at this point don't waste your time with BMW UK). The app is called MHD Flasher N54.

Personally I would buy the cable, buy MHD Flasher, get a complete ECU data log and then see what it says. I highly doubt all the injectors are at fault, I suspect they throw errors due to lack of fuel pressure - if you read about how piezo injectors work it would correlate (upward of 200 bar of fuel pressure).

You could also speak to the tuners directly and send your data logs (JB/Cobb) or visit AMD Tuning in Essex - they are very knowledgeable and would be able to help you.

Good luck

mudster

784 posts

243 months

Monday 27th July 2015
quotequote all
Not sure if it's been linked to, but N54 injectors should be replaced in banks of three. If a single injector fails, all three in that bank need to be replaced. It's therefore entirely feasible that one injector in each bank may have failed, resulting in all 6 requiring replacement. This would mean 4 injectors are not at the end of their serviceable life and the warranty company wouldn't have the wriggle room.

Check with the tech how many injectors actually failed.