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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!

View Poll Results: For 328d owners only: have you had a CEL for a failed NOx sensor?
Yes 20 55.56%
No 16 44.44%
Voters: 36. You may not vote on this poll

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  #1  
Old 01-27-2014, 08:19 PM
diablo2112 diablo2112 is offline
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Mein Auto: 2014 335i F30 & 328d F31
328d NOx sensor problems and check engine lights

The second 328d we recently purchased has started throwing codes and illuminating the check engine light. My wifi-based OBD-II reader says its a failed NOx sensor. This happened at 167 miles from new. The first 328d we had threw this code twice, at 1700 and then 2400 miles.

So far, every 328d I've had experience with has had issues with the NOx sensor, and a review of recent forum posts shows other owners with the same issue. Has this effected you? If so, what did the dealer do?

Thanks.
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  #2  
Old 01-27-2014, 08:33 PM
GreekboyD GreekboyD is offline
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Quote:
Originally Posted by diablo2112 View Post
The second 328d we recently purchased has started throwing codes and illuminating the check engine light. My wifi-based OBD-II reader says its a failed NOx sensor. This happened at 167 miles from new. The first 328d we had threw this code twice, at 1700 and then 2400 miles.

So far, every 328d I've had experience with has had issues with the NOx sensor, and a review of recent forum posts shows other owners with the same issue. Has this effected you? If so, what did the dealer do?

Thanks.
Was the NOx sensor replaced both times?
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  #3  
Old 01-27-2014, 09:53 PM
diablo2112 diablo2112 is offline
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No sensors replaced yet. First car they did a reset. That car was traded against the second which threw the code earlier today. It goes to the dealer tomorrow; we'll see what they do.
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  #4  
Old 01-28-2014, 11:28 AM
GreekboyD GreekboyD is offline
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A reset? Sounds silly to me. They should have changed the NOx sensor right off the bat.
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  #5  
Old 01-28-2014, 03:09 PM
robster10 robster10 is offline
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NOx sensor...

Sometimes a reset may be better. When the tech hands work on the cars something else goes. This happened twice two different cars. bad batch of sensors??? or ECU program fault???? Could be sign of more to come.

Last edited by robster10; 01-28-2014 at 03:11 PM.
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  #6  
Old 01-28-2014, 03:21 PM
diablo2112 diablo2112 is offline
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Post-cat sensor is giving the errors. At the dealer now, they have a PUMA case open and are waiting on instructions from BMW. Service advisor said this was the third 328d he's seen in the last few weeks with this problem. They replaced the sensor on the other two. FYI, dealer has sold about a half dozen 328d here.
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  #7  
Old 01-28-2014, 06:23 PM
GreekboyD GreekboyD is offline
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Quote:
Originally Posted by diablo2112 View Post
Post-cat sensor is giving the errors. At the dealer now, they have a PUMA case open and are waiting on instructions from BMW. Service advisor said this was the third 328d he's seen in the last few weeks with this problem. They replaced the sensor on the other two. FYI, dealer has sold about a half dozen 328d here.
They should have done the same for you right off the bat.
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  #8  
Old 01-28-2014, 07:08 PM
diablo2112 diablo2112 is offline
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PUMA case came back late today. They said the fix is to replace the sensor. No surprise, there. None in stock, will replace in a few days when they get the part.
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  #9  
Old 01-28-2014, 07:12 PM
GreekboyD GreekboyD is offline
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Quote:
Originally Posted by diablo2112 View Post
PUMA case came back late today. They said the fix is to replace the sensor. No surprise, there. None in stock, will replace in a few days when they get the part.
It's interesting that quite a few 328d vehicles are having the same NOx issue. Must be something with the sensor build which makes me wonder if they're replacing it from the same batch and you'll be back there after a month or so.
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  #10  
Old 02-08-2014, 02:14 PM
lolopopy lolopopy is offline
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I got my brand new 2014 328d on Sept 27th. Six minutes into the maiden voyage, I had to turn around and take the car back to the dealership because my check-engine light came on. They said it was resolved (changed the diesel particulate filter) and car went back in for the same issue on Jan 20. They did a software reset and gave the car back to me. Today, the car went back in for again, CEL. To be honest with you I am at the end of my rope. My car has had the CEL three times and all this before it is due for its first oil change???
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  #11  
Old 02-08-2014, 02:18 PM
GreekboyD GreekboyD is offline
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Quote:
Originally Posted by lolopopy View Post
I got my brand new 2014 328d on Sept 27th. Six minutes into the maiden voyage, I had to turn around and take the car back to the dealership because my check-engine light came on. They said it was resolved (changed the diesel particulate filter) and car went back in for the same issue on Jan 20. They did a software reset and gave the car back to me. Today, the car went back in for again, CEL. To be honest with you I am at the end of my rope. My car has had the CEL three times and all this before it is due for its first oil change???
Hold on. They changed your DPF six minutes into driving the car? Sounds like the technicians at your dealership are clueless at diagnosing diesels properly.
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  #12  
Old 02-08-2014, 02:24 PM
lolopopy lolopopy is offline
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Yes that is correct! Hence my continued frustration!
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  #13  
Old 02-08-2014, 02:26 PM
GreekboyD GreekboyD is offline
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Originally Posted by lolopopy View Post
Yes that is correct! Hence my continued frustration!
You need to get your own code reader.
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  #14  
Old 02-08-2014, 02:29 PM
lolopopy lolopopy is offline
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I need a new car! So frustrated. Clearly there is something up with the design if so many of us are having similar issues out there.
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  #15  
Old 02-08-2014, 07:07 PM
DBV DBV is offline
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Is 535d having these issues too?
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  #16  
Old 02-08-2014, 08:59 PM
lolopopy lolopopy is offline
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Quote:
Originally Posted by DBV View Post
Is 535d having these issues too?
No idea but do your research first!!
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  #17  
Old 02-09-2014, 05:29 AM
KeithS KeithS is offline
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Quote:
Originally Posted by DBV View Post
Is 535d having these issues too?
Different engine.
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  #18  
Old 02-09-2014, 07:16 AM
DBV DBV is offline
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Thanks, but researched the death on these diesel models and that is why I was asking for real life experiences. Have not seen any issues with Mercedes diesel models and hardly issues any Audi diesels either. Seems to be a lot more 328d owners on this forum than 535d owners.

Our local dealership has not sold one 328d or 535d yet. Sure the recent diesel gas prices don't help either. I am getting a diesel either way.

Quote:
Originally Posted by lolopopy View Post
No idea but do your research first!!
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  #19  
Old 02-09-2014, 10:33 AM
Geotrash Geotrash is offline
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I'm at 2800 miles now. No CEL incidents or NOx sensor issues yet (knocking on wood).

Dave
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  #20  
Old 02-10-2014, 08:11 PM
GlobalHobo GlobalHobo is offline
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Took delivery of mine on Dec 15, I'm currently at 2400 miles with no issues. I put 45,000 trouble free miles on my 11 335d with a JBD that I thrashed everyday of its life. I am truly hoping this 328d proves to be just good. (or maybe just that my luck will continue!!! )
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  #21  
Old 02-11-2014, 10:08 AM
Hoooper Hoooper is online now
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Sounds like a bad batch of sensors or a choice of sensor build that didnt fit with the demands. Likely they already know the issue and you will get a new sensor that lasts.
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  #22  
Old 02-11-2014, 11:55 AM
Penguin Penguin is offline
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According to a few OTR truckers I've talked with, NOx sensors seem to be a problem with the new SCR systems. I was having chronic CEL/SES light problems, but it would go off before I could get an appointment, and they would claim no codes were stored. Finally I got it to the dealer with the light still on and they followed a BMW procedure which was to clean the DEF nozzle and test drive it. The light came on again during the test drive, so the procedure next said to replace the NOx sensors. This happened at around 37K miles, and I am now at 43K with no SES light since.

If you are near warranty expiration, make sure you get written documentation of the light being on. The two sensors alone were $381 each, which implies an out of warranty fix would probably be $1,000 or more by the time they finished. I suspect the California Emissions warranty would cover it in California, but not sure if it would be cover in other states under the extended emissions warranty.
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  #23  
Old 02-11-2014, 02:18 PM
kubera kubera is offline
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I am currently at 7600 miles on my 328d. No CEL and no problems so far.

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  #24  
Old 02-15-2014, 01:19 PM
acme acme is offline
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Quote:
Originally Posted by Hoooper View Post
Sounds like a bad batch of sensors or a choice of sensor build that didnt fit with the demands. Likely they already know the issue and you will get a new sensor that lasts.
Not a bad sensor issue. I posted the note below in a different thread, and I enclose it here, in case people did not see my earlier post.

Here is the problem and its solution, according to my BMW dealership service advisor.

The problem is that the ECU is getting a signal from the delivery unit in the fuel tank that it is too cold for it to draw diesel fluid. The programming is based in European fuel supplies, not US diesel. US winter diesel is liquid at lower temperatures than European diesel.

The solution is to reprogram the ECU with the latest version of what is called ISTA/P, which comes from BMW-US.

Acmewelding
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Last edited by acme; 02-15-2014 at 09:05 PM. Reason: My use of "DEF" was my error
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  #25  
Old 02-15-2014, 02:10 PM
F32Fleet F32Fleet is offline
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Quote:
Originally Posted by acme View Post
Not a bad sensor issue. I posted the note below in a different thread, and I enclose it here, in case people did not see my earlier post.

Here is the problem and its solution, according to my BMW dealership service advisor.

The problem is that the ECU is getting a signal from the delivery unit in the fuel tank (DEF) that it is too cold for it to draw diesel fluid. The programming is based in European fuel supplies, not US diesel. US winter diesel is liquid at lower temperatures than European diesel.

The solution is to reprogram the ECU with the latest version of what is called ISTA/P, which comes from BMW-US.

Acmewelding
DEF is not fuel. Two different tanks and fluids.
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