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BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

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Old 08-29-2014, 07:06 PM
carotene carotene is offline
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Location: DC
Join Date: May 2014
Posts: 5
Mein Auto: 335d
Getting CBU removal under warranty. WWYD?

Need some advice.

I have a 2010 d with 60k miles,CPO. Last week I got yet another injector SES- my 5thSES this year. Dealer is cleaning out the cbu under warranty and replacing the injectors.. Assuming no DDE issues, the car should be good to go.The car is my daily and I need reliability. I have a baby and don't have the time to spend under the hood every weekend.

Assuming all goes well, would a cbu service every 30k miles keep the SES away? I just can't see myself getting into the egr delete and all that...
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Old 08-30-2014, 03:36 AM
GreekboyD GreekboyD is online now
Officially Welcomed to the 'Fest
Location: Toronto
Join Date: Jan 2012
Posts: 544
Mein Auto: 2009 BMW 335d
I would install a meth kit.
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Old 08-30-2014, 09:01 AM
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Flyingman Flyingman is offline
hang up and drive!
Location: Miami
Join Date: Sep 2009
Posts: 1,965
Mein Auto: 335d

I have 76k and so far no hard evidence of CBU. But I haven't actually gone looking for it either.

There is a spray cleaner that has been recently advertised that claims to be specifically for the Diesels. My INDY wanted to use it on my car before I went the walnut blast route. I haven't actually done anything yet because 1) I'm still under extended warranty and 2) I have no real SES or other codes being thrown, but I suspect my observed drop in MPG this summer could be a symptom.

I would investigate the spray cleaner method first and then the walnut blast. The spray may be an excellent preventive maintenance method, cleaning up the intake every 20k miles or so? It sure appears to be rather simple and inexpensive, if it works.

2010 Black 335D Sport/Premium, Michelin PSS 235/265
2000 Silver Z3 3.0i (Ret)
1999 Silver R1200C (Ret)
1968 Black 1600 Coupe (Ret)
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