[Jhayd11]

Please read carefully as I don't want a repeat of the last attempt, done by dzlmoose who had a bunch of near new 335d's chiming in that their 15k mile car works fine....

I already have votes in the poll for Non US cars and a vote from an owner with only 30k miles. (2/3 which were no's)

I'd like to take a poll for anyone who has had Carbon Build Up issues or items that appear to be related. I paid for a Mass Air Flow swap as that was the code, but 8k miles later the Carbon Build Up was finally diagnosed.

I'd like to take a poll of who has had issues with the car.

SPECIFICALLY: You must have driven it long enough for the problem to manifest, so only those who are near/past the 50k mileage please.

SPECIFICALLY: You must have a US based 335d model that does/did not have any systems removed (i.e. DPF deletes) prior to issues manifesting.

Additionally, this is not a diagnosis page

I am hoping there are a few like me you ditched the failing car but still read the threads.

Also for anyone who can confirm for someone else (i.e. can link to their thread) I would appreciate it.

Originally Posted by floydarogers

floydarogers

Hmmm. Since I haven't had problems, maybe I shouldn't have voted?

Yes, please vote if you have had the car for that many miles. Thank you.

Please state the following:
e90 Post Handle
Model Year
Mileage
SES encounter (i.e. MAF, Misfire, Injector, DEF)
Confirmed Carbon Build Up (Y/N)

[Jhayd11]

jhayd11
2009
60,000
MAF, Injector, Misfire (separate codes over 6 month period)
Carbon Build Up = Yes

[Jhayd11]

Robspages
Yr: 2009
Mileage: 40k
swirl flap linkage
Carbon build up issue yes or no? Yes

ref: http://www.e90post.com/forums/showth...=778979&page=1

[Jhayd11]

pjuhlin
2009
62,000
SES: Unknown
Carbon build up issue YES

ref: http://www.e90post.com/forums/showth...=778979&page=2

[Jhayd11]

NeedaDiesel_335D
Yr: 2010
Mileage: 55k
found fault code 4B05 Cyl 4 0 adaptn
Carbon build up issue yes or no? Yes

http://www.e90post.com/forums/showth...=778979&page=2

[Jhayd11]

DunkinV
2010 Model year
91,200 Miles
SES: Unknown but 7 SES lights in last 12 months
Yes - Carbon build up issue

http://www.e90post.com/forums/showth...=778979&page=3

[Jhayd11]

andys10
Yr: 2011
52,000
all injectors + fuel control module
Carbon build up issue yes or no? Yes

http://www.e90post.com/forums/showth...=778979&page=3

[Jhayd11]

bankerts
Yr: 2010
Mileage: 54k - Purchased at 52k
injector #4
Carbon build up issue yes or no? Yes

http://www.e90post.com/forums/showth...=778979&page=3

[Jhayd11]

ThePicturePro
2009
51,187
injectors are bad and there is carbon build up in the intake
Carbon build up issue- YES

http://www.e90post.com/forums/showth...=778979&page=3

[dixy2k]

Yes.
2011
52000 mi
MAF replaced
EGR valve replaced
EGR cooler replaced
Large turbo replaced
cat converter replaced
back pressure sensor replaced.

[Jhayd11]

CT_335D
2009
47000
Injectors
CBU? Maybe - not confirmed, only mentioned injectors

http://www.e90post.com/forums/showthread.php?t=771507

[Mark M]

Mark M
Yr: 2010
47,000
Carbon build up issue yes or no? Yes
Replaced - Intake, cyl head, injectors, EGR, etc.

http://www.e90post.com/forums/showthread.php?t=910096

[Jhayd11]

dvanhoos
2010
47k
Zero-quantity adaptation, injector, cylinder 4
CBU: Not confirmed, never diagnosed

http://www.e90post.com/forums/showthread.php?t=904007

[floydarogers]

floydarogers
2010
73xxx
n/a
n

Hmmm. Since I haven't had problems, maybe I shouldn't have voted?

[acewiza]

Acewiza
2011
71,000
MAF sensor and "2nd" SCR valve replaced at 71,000
No other issues at this time.

[AzureHaze]

Stupid me. Should of read OP's entire post before voting huh? Disregard my "no" vote please. Only close to reaching 33k.

[strz0001]

strz0001
2011
54,000m, 48,000 @ time of diagnosis
SES encounter (no SES, rough idle, low power, low mpg)
Confirmed Carbon Build Up - yes, removed and cleaned head and intake, took 4 weeks to resolve.

ref: http://www.e90post.com/forums/showth...6#post14299856

[WreckerX5d]

58,000mi, 38k mi with JBD @ 100%

Something with the EGR replaced, not sure if whole thing. I believe this was around 38k miles.

I voted no, but I haven't really checked for carbon build up. I would like to think I do not, considering I put on 500+ hwy mi a week and drive like an ass.

[modobrew]

Maybe you should add the production date as well since some 2011 models were built in 2010. Would be interesting to see the production dates vs carbon build up issues.

[mact3333]

I voted no also..my 2010 had 49K with no carbon issues...my 2011 has 40K on it and no known issues although I have only owned the car for 2 weeks...guess I shouldn't have voted either.

I think its useful for everyone to vote imho cause I would like to see the %'s no matter how many miles is on the car...werent they only made in 10 and 11' so many of them have a decent amount of miles on them I would think.

[Kaylin032]

I'd have asked if people used fuel additives religiously. I use Diesel Kleen and Clear Diesel (yes, both at the same time) in every tank and car is still amazing at 63,000 miles. I also live in a TxLED area.

I had to replace an O2 sensor and a urea tank sensor since purchased new in 2011, and I doubt carbon buildup since I'm still getting an estimated 580-600 miles of range per tank and the car runs like new.

I think there's a potential for a class action lawsuit over the sticker by the gas cap that says to not use additives. That's really where a case can be made.

K

[dixy2k]

I think you are adding approximately $30 to every fill up.
I would rather drive the M5 in that case.