Bimmerfest - BMW Forums - View Single Post - Fuel leak? or fuel breather?
View Single Post
Old 05-19-2020, 06:18 PM
stonex1's Avatar
stonex1 stonex1 is online now
Officially Welcomed to the 'Fest
Location: BC, Canada
Join Date: Oct 2012
Posts: 1,432
Mein Auto: 13' X1 35i

Just wanted to post an update on this issue.

After running the car for about a week without issues. I had a check engine light come on.
I cleared the code using ISTA-D and ran it for a few more days. After about another 5 short trips the check engine light came back. So re-scan for fault codes and it showed the famous DMTL pump fault.
(Diagnostic Module Tank Leak) I ordered a replacement part online and swapped it out.
The original part was dripping with gas, and it must have failed over the winter and leaked fuel up into the dust vent that is right near the wheel well. That was the reason for the leak in the first place.
I likely overfilled my gas tank before I parked it for the Winter. Pressure built up when the weather got warmer.
I have run the car now for around 10 days since putting in the new part and haven't seen the check engine light return.
The part at BMW is $315 CAD but found it online for $150 CAD.

Easy part to replace, it's just up behind the rear bumper. No need to jack the car up or anything.
2013 X1
Reply With Quote