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Old 05-17-2018, 10:09 AM
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Join Date: Dec 2010
Location: Alexandria, VA
Posts: 8
marcesq is on a distinguished road
2011 X5 35D P0112 Fault Code

I had SEL and a P0112 Fault Code - my own Google research wasn't very helpful in analyzing the probably defective part so I brought the vehicle to an independent shop. They quoted replacing the MAF (at an absurd price).

I was able to find the MAF from ecs tuning for less than $30, and replaced it in about 15 minutes - not sure why it was going to cost $250 in labor for the shop to replace it...

Anyways, cleared the code with Torque, and good to go now.

Very easy DIY. I replaced the air filter when the SEL came on and there was no visible debris or damage.
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Old 05-17-2018, 11:28 AM
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Location: Seattle
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On FCPEuro, there are 2 of them:
* BMW Mass Air Flow Sensor (335d X5) - Bosch 0281006147 - $190
* BMW Mass Air Flow Sensor (335d X5) - Genuine BMW 13628509725 - $26

What's the difference? I can't tell you.

More on that code from Rheingold/ISTA-D

Quote:
Fault description
The fault is recognised if the sensor signal of the intake air temperature exceeds a limit value.

Limit value: between 129.96 C and 144.96 C (version-dependent).

Condition for fault identification
Monitoring is only performed when no fault with the sensor supply voltage is set.

Control unit voltage: 9.5 V to 16 V.


Condition for fault memory entry
The fault is entered if it is present for longer than the following period (debounce time): 1000 ms

Action in service
1. Check line and plug connections
2. If wires and plug connections are OK:

Replace mass air flow sensor.

Fault effect and breakdown warning None

Driver information Malfunction indicator lamp

Service instruction
If the hot film air mass meter is replaced, the following service function must be carried out: Delete adaptations, air mass system.
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Old 05-17-2018, 01:00 PM
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Thanks, Seattle - I didn't perform the "delete adaptations, air mass system" service functions, so let's hope that doesn't haunt me later

I can tell you that the OEM BMW part from ECS was labeled with all of the BMW and Bosch identifiers one would expect to see. The metal grating medium/film appeared a bit different (more robust) from the one I removed, but that just may be 70k+ miles of use.
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