335d DEF Tank Repair

nh1stbimmer · 01-04-2024, 05:54 PM

Hi all, my 2011 335d has a faulty level sensor in the DEF tank. The no-start counter is down to about 450 miles.

I know the regular fix is replacing the tank, but that's $3k for just the part. Has anyone had experience using the XeModeX repair kit or the mail-in repair service?

https://xemodex.com/us/complete-def-...it-by-xemodex/

https://xemodex.com/us/product/bmw-3...epair-service/

The car is at 155k miles so well beyond any warranties or recalls.

The other option is to delete the whole system, but I'm having trouble finding anyone advertising the reprogramming service. Does anyone have experience/recommendations within a 450 mile radius of Hampton Roads, VA?

POBEP · 01-04-2024, 11:04 PM

Quote:

Originally Posted by nh1stbimmer

Hi all, my 2011 335d has a faulty level sensor in the DEF tank. The no-start counter is down to about 450 miles.

I know the regular fix is replacing the tank, but that's $3k for just the part. Has anyone had experience using the XeModeX repair kit or the mail-in repair service?

https://xemodex.com/us/complete-def-...it-by-xemodex/

https://xemodex.com/us/product/bmw-3...epair-service/

The car is at 155k miles so well beyond any warranties or recalls.

The other option is to delete the whole system, but I'm having trouble finding anyone advertising the reprogramming service. Does anyone have experience/recommendations within a 450 mile radius of Hampton Roads, VA?

Can you publish codes?
If active code is for active tank level sensor - perhaps you can use OE part F01C600252

nh1stbimmer · 01-15-2024, 11:48 AM

I don't have the codes on me, but the issue was a bit worse than I initially thought. The SCR module on the active tank and the level sensor on the passive tank are both bad.

Quoted about $5k to fix (local BMW shop), and $4800 to do the delete with a new catalyst installed to keep from coal rolling. Will probably do the latter.

DougNBodie · 05-12-2025, 06:14 PM

Quote:

Originally Posted by nh1stbimmer

I don't have the codes on me, but the issue was a bit worse than I initially thought. The SCR module on the active tank and the level sensor on the passive tank are both bad.

Quoted about $5k to fix (local BMW shop), and $4800 to do the delete with a new catalyst installed to keep from coal rolling. Will probably do the latter.

This is an easy fix....that cost me a bunch of time and money a few years back. Search: Fill Level Sensor...Rewire, resister fix. You take a 10 ohm resister (I believe, It could be 1 or 3 ohm) Anyways, you just jam that resister into the sensor plug (gently) with each end of the resister going into each opening of the sensor. Done, no more code. I mean who needs a this sensor anyways.

BeamerDan · 01-06-2026, 06:27 PM

DougNBodie I had my 2011 335d diagnosed with the same issue have to replace the DEF tank 6k parts and labor. I am going to just sell the car doesnt make sense to dump thousands into it. Are there other options..I m not a mechinanic a little handy , but not a car junky. Any suggestions ?

POBEP · 01-06-2026, 11:43 PM

Quote:

Originally Posted by BeamerDan

DougNBodie I had my 2011 335d diagnosed with the same issue have to replace the DEF tank 6k parts and labor. I am going to just sell the car doesnt make sense to dump thousands into it. Are there other options..I m not a mechinanic a little handy , but not a car junky. Any suggestions ?

$6K is rip off.

* ask forum members for a used tank in WTB section
* if this has to do with passive tank level sensor - solder resistor
* active tank guts are serviceable - ask forum members for used parts
* find an INDY that can repair it at lower cost (max labor is 3h)

I had to fix mine twice - so far my total cost was $23 ...

01-04-2024, 05:54 PM	#1
nh1stbimmer Registered 2 Rep 2 Posts Drives: BMW 335d Join Date: Jan 2024 Location: VA iTrader: (0)	335d DEF Tank Repair Hi all, my 2011 335d has a faulty level sensor in the DEF tank. The no-start counter is down to about 450 miles. I know the regular fix is replacing the tank, but that's $3k for just the part. Has anyone had experience using the XeModeX repair kit or the mail-in repair service? https://xemodex.com/us/complete-def-...it-by-xemodex/ https://xemodex.com/us/product/bmw-3...epair-service/ The car is at 155k miles so well beyond any warranties or recalls. The other option is to delete the whole system, but I'm having trouble finding anyone advertising the reprogramming service. Does anyone have experience/recommendations within a 450 mile radius of Hampton Roads, VA?
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01-15-2024, 11:48 AM	#3
nh1stbimmer Registered 2 Rep 2 Posts Drives: BMW 335d Join Date: Jan 2024 Location: VA iTrader: (0)	I don't have the codes on me, but the issue was a bit worse than I initially thought. The SCR module on the active tank and the level sensor on the passive tank are both bad. Quoted about $5k to fix (local BMW shop), and $4800 to do the delete with a new catalyst installed to keep from coal rolling. Will probably do the latter.
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01-06-2026, 06:27 PM	#5
BeamerDan Registered 0 Rep 1 Posts Drives: BMW 335d Join Date: Jan 2026 Location: Carlsbad CA iTrader: (0)	DougNBodie I had my 2011 335d diagnosed with the same issue have to replace the DEF tank 6k parts and labor. I am going to just sell the car doesnt make sense to dump thousands into it. Are there other options..I m not a mechinanic a little handy , but not a car junky. Any suggestions ?
	Appreciate 0 Quote