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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 06-16-2016, 06:50 PM
jgoehner jgoehner is offline
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Location: Los Angeles, CA
Join Date: Dec 2015
Posts: 2
Mein Auto: 330Ci
Weird MRS Issue

Hi guys,

Got a weird MRS issue on a 2002 330Ci I need help with.

For as long as my girlfriend has had her car the airbag light has been on. Finally plugged in my code reader and it came back with a Passenger Head Airbag Fault. I tried to clear it but it kept coming back. Pull everything apart and find the case of the MRS module is at 12V+ and when it's bolted back in place it forces the light back on (but not if I anchor the two brown wires attached to the lug).

Is this a bad MRSZ4 Module or am I missing something?

Thanks in advance.
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Old 06-16-2016, 07:30 PM
Fast Bob's Avatar
Fast Bob Fast Bob is online now
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Join Date: Jun 2004
Posts: 38,307
Mein Auto: 2004 330Ci ZHP 3 pedals
It`s quite possible that a repair was done by a previous owner, and the code was never properly reset. I`m pretty certain that most "enthusiast"-type scanners are not capable of resetting airbag codes, that usually requires a trip to the dealer (or a savvy tech with the proper software)....
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