[BMW Lawman]

My check engine light came on the other day and it's showing code P0456, "evaporative emission system leak detected(very small leak)". I cleared the code, but it came back. Took it to my dealership and they diagnosed the Leak Detection Module has failed and want $552.37 for the diagnosis and replacement of the module and dust filter.

The modules are all of $30 to $40, and my service advisor said it was a 1 hour job, which leads me to believe it's probably not overly complicated, or really worth the $552.37 that they are quoting

I've searched the forums using different words/terminology, but I haven't been able to locate a DIY for replacing the module on an F30 335. Anyone done this or know of a write up for an F30? I've looked at the E90 write ups and videos, but the parts diagrams for the E90 seem to differ from the F30.

[BMW Lawman]

and before anybody asks............

yes I'm out of warranty.....55k.........it's a leak detection pump that connects to the activated charcoal filter on the fuel tank ventilation system....... and no, I don't want to drive around with my check engine light on.

[Polo08816]

Originally Posted by BMW Lawman

My check engine light came on the other day and it's showing code P0456, "evaporative emission system leak detected(very small leak)". I cleared the code, but it came back. Took it to my dealership and they diagnosed the Leak Detection Module has failed and want $552.37 for the diagnosis and replacement of the module and dust filter.

The modules are all of $30 to $40, and my service advisor said it was a 1 hour job, which leads me to believe it's probably not overly complicated, or really worth the $552.37 that they are quoting

I've searched the forums using different words/terminology, but I haven't been able to locate a DIY for replacing the module on an F30 335. Anyone done this or know of a write up for an F30? I've looked at the E90 write ups and videos, but the parts diagrams for the E90 seem to differ from the F30.

Originally Posted by BMW Lawman

and before anybody asks............

yes I'm out of warranty.....55k.........it's a leak detection pump that connects to the activated charcoal filter on the fuel tank ventilation system....... and no, I don't want to drive around with my check engine light on.

That's because it's not necessarily a common failure.

Anyways, I believe what you're looking for is under page 160-31 Fuel Tank Evaporative Control System of the Bentley F30 Service Manual.

There's only 2 things in the section.

-Activated carbon canister, removing and installing
-NVLD pressure switch, removing and installing

If you're out of warranty, I highly suggest you get the Bentley F30 Service Manual as well as ISTA/D Rheingold. It seems like Bentley and the ISTA/D Rheingold procedures mirror each other.

[BMW Lawman]

Originally Posted by Polo08816

That's because it's not necessarily a common failure.

Anyways, I believe what you're looking for is under page 160-31 Fuel Tank Evaporative Control System of the Bentley F30 Service Manual.

There's only 2 things in the section.

-Activated carbon canister, removing and installing
-NVLD pressure switch, removing and installing

If you're out of warranty, I highly suggest you get the Bentley F30 Service Manual as well as ISTA/D Rheingold. It seems like Bentley and the ISTA/D Rheingold procedures mirror each other.

ummmm, thanks. I guess I should have defined a "write up" as........ a DIY post, commonly found on this or similar forums, that I don't have to pay $129.95 to look at.

It appears that it is a common failure on pre-"F" series BMW's, as there are many posts, write ups, and DIYs regarding replacements on those earlier models.

[Polo08816]

Originally Posted by BMW Lawman

ummmm, thanks. I guess I should have defined a "write up" as........ a DIY post, commonly found on this or similar forums, that I don't have to pay $129.95 to look at.

It appears that it is a common failure on pre-"F" series BMW's, as there are many posts, write ups, and DIYs regarding replacements on those earlier models.

...or you could pay the dealer $552 to fix it for you.

Parts cost:
Module - $101 - https://www.getbmwparts.com/parts/in...&siteid=214672
Activated charcoal - $349 - https://www.getbmwparts.com/parts/in...&siteid=214672

Did you think owning an out of warranty European car was inexpensive? A Bentley service manual @ $129 is nothing compared to the parts cost that you'll inevitably spend.

[BMW Lawman]

Originally Posted by Polo08816

...or you could pay the dealer $552 to fix it for you.

Parts cost:
Module - $101 - https://www.getbmwparts.com/parts/in...&siteid=214672
Activated charcoal - $349 - https://www.getbmwparts.com/parts/in...&siteid=214672

Did you think owning an out of warranty European car was inexpensive? A Bentley service manual @ $129 is nothing compared to the parts cost that you'll inevitably spend.

ummmmm......what?

Please scroll back to my first post and locate the single, simple question I asked. It is clearly indicated by the "?" at the end of the sentence. Or you can just re-read the title of the post.

As far as the parts you listed, they are incorrect. The OEM BMW Leak Diagnosis Module for my car is $30.45 and the OEM BMW dust filter incorporated into the vent pipe is $54.44. I'm not sure why you are quoting me an activated carbon filter, as I never mentioned that needing replacement on my car.

In regards to your DB statement about owning an out of warranty BMW, grow up.

[Polo08816]

Originally Posted by BMW Lawman

ummmmm......what?

Please scroll back to my first post and locate the single, simple question I asked. It is clearly indicated by the "?" at the end of the sentence. Or you can just re-read the title of the post.

As far as the parts you listed, they are incorrect. The OEM BMW Leak Diagnosis Module for my car is $30.45 and the OEM BMW dust filter incorporated into the vent pipe is $54.44. I'm not sure why you are quoting me an activated carbon filter, as I never mentioned that needing replacement on my car.

In regards to your DB statement about owning an out of warranty BMW, grow up.

That's a cute story.

Do yourself a favor and spend the money on a Bentley service manual.

[weber_335i]

Looks like BMW know about the fault, see similar repair on a N55 engine for an X3 at
https://bmwtechnician.com/2015/11/20...coal-canister/

Note that you must be careful to get a replacement part that will not also fail soon.

[weber_335i]

My 2013 335i was recently serviced for this issue. It was a warranty repair, so I can't say anything about how it was done because I didn't see it. The description of the work includes reference to a procedure code: "TEST PLAN ABL DIT AT1214_TVD_NVLDII". Maybe a google search for that procedure could help, but the repair notes this procedure was one of many that might apply to fixing the vacuum leak that could arise from any one of multiple locations. Knowing how to test the leak is not trivial and selecting the right parts to fix it is also not trivial. Unless you have the right tools and you can pay for access to the BMW technical info system, I would leave this one to the pros.

[weber_335i]

See also https://www.obd-codes.com/p0456

For my repair, the parts replaced were:

http://www.bmwdirectparts.com/oe-bmw/16137333302 - leak detect pump
http://www.bmwdirectparts.com/oe-bmw/16137438487 - vent pipe
http://www.bmwdirectparts.com/oe-bmw/16131183912 - leak detect pump grommet

[messygarageBMW]

I know this is an older post but I called BMW today to check on something else and they noted that my car was given a limited extended warranty of 10 years 120K miles for this Leak Diagnosis Module.

I called BMW customer relations at 1-800-525-7417 and they looked up this information with the last 7 of my VIN. Not sure if this helps.

[socotra123]

Originally Posted by BMW Lawman

and before anybody asks............

yes I'm out of warranty.....55k.........it's a leak detection pump that connects to the activated charcoal filter on the fuel tank ventilation system....... and no, I don't want to drive around with my check engine light on.

Did you ever see if your car was covered under the extended warranty for this part? bmw-rp.com. My 2013 shows extended life warranty (ELW) for the N20 Leak Diagnosis Module (NVLD).

[Orion4]

I just received my letter (dtd: April 2017) from BMW for my 2013 F30 335i, extending the limited warranty for the B-ELWR 2016 Fuel Tank Leak Diagnoistic Module (NVLD) 10Y120M to 10 years/120K miles. It is not a Recall or Service Action, but rather a reimbursement for "qualifying customer-pay repairs".

Letter/Form attached

[messygarageBMW]

Even though I heard about this (and posted it in January) I also got my letter today stating the warranty was extended for this part and they are reimbursing for costs of repairs I believe so OP should check into that.

[tyang]

Well I did not get any letter from BMW. But I got a CEL after I recharged the battery on my car. I took my car (out of warranty) to the dealership and they diagnosed as a faulty NLVD. It was just replaced today at no charge, but it took them the whole day to diagnosed and replaced the parts. Glad I did not get charge $500.00 plus for this. I think the SA knew what was wrong with the car when he mentioned early on that the service may be covered under an extended warranty (which at the time I have no clue what he was referring to). And yes, the 3 parts listed above are the same as what is listed the printout.

[tgmsocal]

BMW should cover this, per the letter that Orion4 mentioned. I have also received this same letter - 10 years / 120k miles. Bring this up with your dealership, for sure.

-tgm

[pallymore]

I received a letter from yesterday stating that NVLD is now covered for 10 years/120k miles. You should talk to your SA about this.

[F30RiK]

Not covered in Canada as usual, someone know where it's located in the engine bay ?

[F30RiK]

someone found where's the NVLD on F30, the fault came back on my car (I first replaced the gas tank cap and it was gone for some time) now it's back.

I want to replace the NVLD as it's not covered in Canada by BMW

[nyc_dude]

http://www.bmwdirectparts.com/oe-bmw/16137333302 - leak detect pump
http://www.bmwdirectparts.com/oe-bmw/16137438487 - vent pipe
http://www.bmwdirectparts.com/oe-bmw/16131183912 - leak detect pump grommet

Parts...New TIS has the procedure.

Search the forum for the code 190302.

Cheers

[Billfitz]

As of April 2017 the warranty on the leak diagnostic module was extended to 10 years/100,000 miles.

[14F30Daily]

So My CEL just came on with the P0456 code reading. Is the best course of action from here to call the dealer for service if this is under warranty? Never really use them and I bought my car used from a 3rd party dealer.