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E90/E92/E93 M3 (2008 - 2014)
4th generation E90 M3 sedan, E92 M3 coupe and E93 M3 convertible. The last of the naturally aspirated M3s, powered by a 4.0 liter V8 making 414hp and 295 lb-ft of torque.

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Old 04-07-2013, 11:21 AM
TeaRex714's Avatar
TeaRex714 TeaRex714 is offline
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Location: Houston, Texas
Join Date: Oct 2006
Posts: 426
Mein Auto: 2015 740Li
First Problem. Evap leak

At 175,000 miles, I just got my first check engine light. The code was a P0442 (Evap Leak - Small) which I immediately suspected to be the DMTL (Diagnostic Module Tank Leakage) pump. This was mostly because this silly little pump has failed on all three of the BMWs I've owned. First I got the "tighten gas cap" error message then, after a few startups with that message (I did replace the gas cap, just in case it really was that) it shifts to the official error code for a fuel system leak and says "increased emmissions" in the dash message. Since it wasn't a gas cap problem, and I'd had this same issue before, I just ordered the DMTL pump (part number 16137193479 for my 2008 M3 Sedan, a little under $94 delivered) and put it in. Problem solved.

The pump/charcoal canister is located just behind the driver's side wheel well. You could get to it all without taking the wheel well liner out, but it's a lot easier to get around in there with it out. The DMTL pump is the black/white part at the front of the canister.
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Two bolts hold the canister assembly in place, so the whole assembly can be taken down pretty easily.
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There's an electrical connection, a hose connection and the pump plugs into a rubber grommet in the canister. The pump has three Torx screws attaching it to the canister as well.
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The whole job took about 45 minutes, including cleanup, and is don with a T-20 Torx (where the pump attaches to the canister), a 10mm socket (attaching the canister to the car and a few of the wheel well liner nuts) and an 8mm socket (wheel well liner and a small cover right behind the wheel that covers the canister assembly.

Hopefully this is helpful if any of you have this problem and want to take care of it yourselves.

The wheel
2015 740Li Black Sapphire Metallic. Her name is Samantha
2008 M3 Sedan Alpine White / Fox Red - Sold at 219K miles
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Old 04-07-2013, 12:17 PM
FlyingLow78 FlyingLow78 is offline
Driving on instruments
Location: The RoK
Join Date: Jul 2011
Posts: 309
Mein Auto: 2015 M3
I find the quality of this post to be Grade-A.

And 175,000 miles! That's like 700 tanks of gas!

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Old 04-07-2013, 12:24 PM
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NASA43 NASA43 is offline
Make Their Ass Quit!
Location: Alabama
Join Date: Jul 2003
Posts: 1,281
Mein Auto: 2008 M3
Thats a damn well buit car to go 175000 before its first code. I have only had one so far and mine was built in Jan 2008.
2008 M3 Sedan, Silverstone II, Fox Red Extended, 6MT
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