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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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  #1  
Old 12-06-2014, 07:39 AM
diapason8 diapason8 is offline
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2011 335d : 69k and CBU

Was reading the thread about "69000 and no CBU" a couple of days ago and was going to reply about my 2011 335d being clean so far... good thing I didn't since my SES light came on and I've been diagnosed with the dreaded CBU problem. I'm just over 69k miles.

SA gave me the standard reply from BMW that they won't cover the cleaning under either the extended warranty or the extended maintenance that I purchased for the car.

Any reports of folks getting BMWNA to change their minds on covering this recently ? Or now that the SIB on this is out they are just expecting owners to eat the cost ? I already paid for the extended warranty/service hoping to avoid expensive repairs like this one and am understandably upset and disappointed.
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  #2  
Old 12-06-2014, 08:57 AM
F32Fleet F32Fleet is offline
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Quote:
Originally Posted by diapason8 View Post
Was reading the thread about "69000 and no CBU" a couple of days ago and was going to reply about my 2011 335d being clean so far... good thing I didn't since my SES light came on and I've been diagnosed with the dreaded CBU problem. I'm just over 69k miles.

SA gave me the standard reply from BMW that they won't cover the cleaning under either the extended warranty or the extended maintenance that I purchased for the car.

Any reports of folks getting BMWNA to change their minds on covering this recently ? Or now that the SIB on this is out they are just expecting owners to eat the cost ? I already paid for the extended warranty/service hoping to avoid expensive repairs like this one and am understandably upset and disappointed.
Have a discussion with the service manager and get them to ask BMWNA for a "goodwill" repair and be prepared to carry some of the cost. Try to make the dealer your advocate. The cleaning isn't all that expensive TBH. The extended warranty you have will come into play when they start replacing injectors after the cleaning has been done.

On the bright side 70k miles between cleanings isn't necessarily terrible and the car will drive like a freaking banshee once it has been cleaned out.

GL
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  #3  
Old 12-06-2014, 09:09 AM
diapason8 diapason8 is offline
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Thanks - that's the approach I was planning to take. The dealer I've been going to has been good in the past and if memory serves, is a family owned business, so I'm hoping to be able to get them on my side. The SA was very sympathetic so hopefully he can get the manager to be an advocate.

Have not noticed a major drop in mileage and there's no rough idle, etc. that others have noticed, so I'm guessing it's just getting to the point of needing the cleaning. The SES light even turned off the night before I took it in to get checked, but the code was there on the mass air flow sensor. (They had just replaced the sensor and said that if the SES comes on again, it's CBU related.) Maybe me getting on the throttle a little heavier than normal earlier in the day cleaned a little gunk out !
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  #4  
Old 12-06-2014, 09:22 AM
KeithS KeithS is offline
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Unless it's near the expiration of the factory warranty or you have an extended will it be fully covered. But 69K miles is pretty far from the expiration of the factory. The good news is this has happened enough at this point that CBU diagnostics and cleaning is becoming routine. They are no longer throwing expensive parts at the problem, that were not broken in the first place to solve the issues.

While CBU cleaning cost is dropping all the time, I'm not sure what the full price would be at this point. At least the cost is low enough it's no longer a reason to dump the car. But with the added cost of "routine cleaning", the diesel does not save any $$ over the gas version in the long run, It may still actually cost more when you include the initial higher purchase price. And BMW wonders why Diesel sales are so poor.
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  #5  
Old 12-06-2014, 11:33 AM
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floydarogers floydarogers is offline
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Not sure where you are in "Southern New England", but if it's one of the CA Warranty states any CEL before 70K should be covered by that warranty. Period. Mention that to your SA also; they love fixing problems that they can charge BMWUSA for.
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  #6  
Old 12-06-2014, 12:10 PM
Timujin Timujin is offline
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It should be an emissions related warranty repair IMO.
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  #7  
Old 12-06-2014, 03:23 PM
DaveN007 DaveN007 is offline
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Quote:
Originally Posted by diapason8 View Post
Was reading the thread about "69000 and no CBU" a couple of days ago and was going to reply about my 2011 335d being clean so far... good thing I didn't since my SES light came on and I've been diagnosed with the dreaded CBU problem. I'm just over 69k miles.

SA gave me the standard reply from BMW that they won't cover the cleaning under either the extended warranty or the extended maintenance that I purchased for the car.

Any reports of folks getting BMWNA to change their minds on covering this recently ? Or now that the SIB on this is out they are just expecting owners to eat the cost ? I already paid for the extended warranty/service hoping to avoid expensive repairs like this one and am understandably upset and disappointed.

Really? Your dealer is screwing you, my friend.

http://www.bimmerfest.com/forums/sho...32#post8653432
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Last edited by DaveN007; 12-06-2014 at 03:27 PM.
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  #8  
Old 12-06-2014, 03:30 PM
diapason8 diapason8 is offline
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Thanks for the heads up on the CA emissions issue - yes, it is one of those states and I'll point that out to the SA.
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  #9  
Old 12-07-2014, 01:57 PM
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mecodoug mecodoug is offline
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My dealer in MA west of Springfield replaced all 6 injectors and did a carbon cleaning with 'mostly' goodwill. I don't know how much of that came from them and how much from BMW. I paid around $1300 out of pocket. Plus, they had me in a loaner for 3 weeks while they diagnosed and worked on my car (not alot of 335d's in these parts I guess.) All this at about the same mileage as the OP's but I do not have any extended coverage's. A few months later I am at 75K and the car does run like new.
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  #10  
Old 12-10-2014, 10:55 AM
NWCT335d NWCT335d is offline
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If you have CPO, you are covered. There is a service information bulletin (dont have the SIB number immediately handy, sorry) that explains the process for the dealer to clean up the CBU. That same SIB also states that the clean up is covered under the factory and CPO warranty.

Have the dealer check for this (or better yet search here and the diesel forum on e90post) SIB and you are all set. If they still give you a hassle, immediately find another dealer.

BTW, which dealer and where are you located?
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  #11  
Old 12-10-2014, 02:07 PM
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rmorin49 rmorin49 is offline
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Having to deal with CBU every 50-75k miles is unacceptable on a modern diesel engine. BMW needs to do some serious rengineering IMHO.
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  #12  
Old 12-10-2014, 06:54 PM
T&TMILLER T&TMILLER is offline
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Cbu ?

At the risk of asking a stupid question what is CBU ?
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  #13  
Old 12-10-2014, 07:05 PM
mattebury mattebury is offline
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Carbon
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  #14  
Old 12-11-2014, 03:48 PM
diapason8 diapason8 is offline
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Quote:
Originally Posted by NWCT335d View Post
If you have CPO, you are covered. There is a service information bulletin (dont have the SIB number immediately handy, sorry) that explains the process for the dealer to clean up the CBU. That same SIB also states that the clean up is covered under the factory and CPO warranty.

Have the dealer check for this (or better yet search here and the diesel forum on e90post) SIB and you are all set. If they still give you a hassle, immediately find another dealer.

BTW, which dealer and where are you located?
Unfortunately, I'm not under CPO - bought the car new and purchased the extended warranty and service contract to cover it 'till 100,000 miles.

The SIB is 11 03 14 - it says that the carbon cleaning is covered under the original 50,000 mile warranty and the CPO warranty, but the extended warranty (buried in one section) says that carbon build up is not.

It's ridiculous that they would consider an engine clogging itself with carbon every 70,000 miles to be "normal". It's bad engineering and poor customer service on their part.

Last edited by diapason8; 12-11-2014 at 03:51 PM.
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  #15  
Old 12-11-2014, 05:08 PM
NWCT335d NWCT335d is offline
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You should contact BMWNA. I think that depending on the year, the CPO warranty states the same thing about carbon build up, but yet the SIB states that it is covered. There is no reason you should have to pay for this after shelling out the extra money for the extended warranty.
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  #16  
Old 12-11-2014, 06:17 PM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by diapason8 View Post
Unfortunately, I'm not under CPO - bought the car new and purchased the extended warranty and service contract to cover it 'till 100,000 miles.

The SIB is 11 03 14 - it says that the carbon cleaning is covered under the original 50,000 mile warranty and the CPO warranty, but the extended warranty (buried in one section) says that carbon build up is not.

It's ridiculous that they would consider an engine clogging itself with carbon every 70,000 miles to be "normal". It's bad engineering and poor customer service on their part.
A brand new post where the poster says that his extended warranty is covering it:
http://www.bimmerfest.com/forums/sho...d.php?t=813919
(He says extended, maybe he means CPO...?)
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  #17  
Old 12-11-2014, 06:26 PM
NWCT335d NWCT335d is offline
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Quote:
Originally Posted by diapason8 View Post
Unfortunately, I'm not under CPO - bought the car new and purchased the extended warranty and service contract to cover it 'till 100,000 miles.

The SIB is 11 03 14 - it says that the carbon cleaning is covered under the original 50,000 mile warranty and the CPO warranty, but the extended warranty (buried in one section) says that carbon build up is not.

It's ridiculous that they would consider an engine clogging itself with carbon every 70,000 miles to be "normal". It's bad engineering and poor customer service on their part.
Can you tell us the name of the dealer? NY, CT? I am in CT and go to BMW of Watertown (where I bought the car), but work in Danbury near BMW of Ridgefield.
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  #18  
Old 12-12-2014, 07:30 AM
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bimmerdiesel bimmerdiesel is offline
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diapason: What kind of warranty do you have Platinum/ gold or powertrain?
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  #19  
Old 12-12-2014, 05:31 PM
diapason8 diapason8 is offline
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I have the Gold package - the so called fine print excludes CBU from coverage.

Latest chapter in the saga - the "limp mode" light came on as I was leaving for work this morning. Got about 200 feet down the road and on it came... :-(
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  #20  
Old 12-12-2014, 06:30 PM
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need4speed need4speed is offline
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Originally Posted by diapason8 View Post
I have the Gold package - the so called fine print excludes CBU from coverage.
Latest chapter in the saga - the "limp mode" light came on as I was leaving for work this morning. Got about 200 feet down the road and on it came... :-(
Not finding this in my BMW extended Vehicle Protection terms/ what is not covered. Where are you seeing it? Thanks. N4S
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  #21  
Old 12-18-2014, 03:09 PM
bballfreak bballfreak is offline
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Have a 2009 335d with 50K miles. I drive it hard from time to time, like going at 120mph on i-10 from San Antonio to Houston.
I do add BG244 diesel additive from time to time and is suppose to help with this carbon buildup?
My extended warranty runs out in August 2015.
now I am worried with so many people having problems with CBU.
I love the car and is in mint shape.
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  #22  
Old 12-18-2014, 09:42 PM
DaveN007 DaveN007 is offline
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Quote:
Originally Posted by bballfreak View Post
Have a 2009 335d with 50K miles. I drive it hard from time to time, like going at 120mph on i-10 from San Antonio to Houston.
I do add BG244 diesel additive from time to time and is suppose to help with this carbon buildup?
My extended warranty runs out in August 2015.
now I am worried with so many people having problems with CBU.
I love the car and is in mint shape.
We know that some dealerships will blame CBU on your driving style. They used to say it was people who didn't drive their cars hard enough...now we are hearing "driving too hard before warm up".

I don't think anyone really knows why some cars choke up at 40k and others are symptom free at 70k. Could be a mix of fuel, driving conditions...who knows.

Worst case scenario, you will be in for a few thousand dollars in repairs to reset the carbon clock.
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  #23  
Old 12-18-2014, 10:53 PM
FredoinSF FredoinSF is offline
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Quote:
Originally Posted by DaveN007 View Post

{SNIP}

Worst case scenario, you will be in for a few thousand dollars in repairs to reset the carbon clock.
Not having re-read the whole thread, the problem is that most people in the US do not have "a few thousand dollars" just laying around waiting to "reset the diesel clock" - nor should they have to really...
It's hard to stay committed to the car when faced with multi thousand dollars in BMW Diesel Drama when you have kids orthodontist and college funds to worry about while everyone else on your block is driving a perfectly acceptable Lexus that just needs a monthly payment, weekly gas, and an oil change every 5k miles. CBU is a nasty surprise that no one expects and not everyone can deal with when they sign the dotted line for the Ultimate Driving Machine.
We probably agree, just pointing out that being expected to come up with a few thousand dollars once or twice during ownership period is not acceptable, nor is it the norm with modern day car reliability standards, nor does the typical American household have it in their budget.
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  #24  
Old 12-19-2014, 04:57 AM
KeithS KeithS is offline
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I agree having to do expensive repairs are not the norm. But I also did not budget for the $5K automatic transmission my 540iT ate a few years back either. No these things should not happen, but they do. In the case of carbon, being somewhat predictable you can at least plan for it. As I said earlier, this negates any fuel cost savings the car would have offered.
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  #25  
Old 12-19-2014, 06:25 AM
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Pat_X5 Pat_X5 is offline
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Wow, no wonder BMW never continued selling the 6 cylinder diesel engines in the new F30 line.

Guess BMW knew there was a problem with the engine and dropped the 335d after 2011...

While I had it for 3 years, I did enjoy the car immensely - it was the best drive I have ever had.

The X5d with it's diesel 6 cylinder engine is not the same as the 335d....
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