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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-22-2007, 08:05 PM   #1
mpower325
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SRS Airbag Light- Where is Airbag Control Module?

I have a 2000 328ci.. So A few weeks ago my airbag light popped up. I ordered the Peake Research SRS Tool and I pull up fault code 01, 01.. which seems to be.. Control Unit Fault, A/D Convertor.

Anyone have this before? If so, what is the fix?

Anyone know where the e46 airbag control module is?

When I reset the light, it pops back on by the end of the day.
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Old 05-22-2007, 09:35 PM   #2
mpower325
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please anyone
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Old 05-24-2007, 12:34 PM   #3
Jred
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2000 328Ci Airbag Light On

I also have a 2000 328Ci and the airbag light just came on the other day.
I've been scanning this forum, looking for all the possible causes and it
appears that it could be in any one of the following;

seat belt tensioner switch (either driver or passenger, I'm guessing)
passenger occupancy sensor mat (supposedly a PITA to replace)
connections under the passenger seat for the sensor mat
airbag control module (I don't know where this is located yet, or how much $)

I'll be looking into this a bit more this weekend and if I find anything usefull,
I'll get back to you. Please do the same if you find any additional info.

Thanks and good luck,

Jred
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Old 05-25-2007, 03:51 PM   #4
BYeLisToK
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If it is your passenger occupancy sensor it is a PITA to replace but I did it... I should have done a write up on it, but I didn't have time... let me know if you have any questions.
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Old 05-25-2007, 08:17 PM   #5
Jred
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My first question, and I haven't found a definitive answer on this forum yet, is
how to figure out where the source of the problem is located? Several posts
indicate that they were able to read an error code from "the computer". Are
they referring to the OBDII diagnostic port? No one says for sure. Tomorrow,
I'm taking it over to AutoZone and have them read it to see if that gives any
clues. Other than that, is my only other option to take it to a dealer and have
them read it? Any information on how you were able to zero in on the source
of the problem would be of great help.

Thanks,

Jred
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Old 05-26-2007, 12:41 AM   #6
Sean Wallace
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air bag module

Its under the cup holder, arm rest area, you will have to take it apart to get at it.
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Old 05-29-2007, 08:10 PM   #7
chu77
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Quote:
Originally Posted by Sean Wallace View Post
Its under the cup holder, arm rest area, you will have to take it apart to get at it.
I can't find it under there? Do you have pics?

edit: found it!!!!


Last edited by chu77; 05-29-2007 at 08:18 PM.
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Old 05-29-2007, 09:01 PM   #8
chu77
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Ok, after taking the cup holder out it's under the carpet.... do i cut the carpet? Or is there another way of getting to it?
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Old 05-30-2007, 10:08 PM   #9
dbond
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I have similar problem, air bag + belts lights are on. I took it to an indy shop that specializes in BMWs. He can read any body controller for errors except of airbag control module. That one refused to communicate with his diagnostic tool. The guy told me to look for a blown fuse or broken connection first. If this does not help replace the control module, which is ~$300 .
I was wondering if any had similar problem, and found a solution.
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Old 06-06-2007, 08:19 PM   #10
Jred
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This morning, I took my car to a local independent garage who works on BMWs.
He connected this fancy laptop-sized diagnostic tool to the port and said that
the memory registered 49 faults of the drivers airbag (on steering wheel) having
too high resistance. I told him that the 49 faults were, most likely, 49 times
that I started the car since the light first appeared, since every time I start the
car, the light is on, then goes out for a about a second and then comes back on
and stays on until I shut the car off.

He, then, used the tool to reset the light and, so far, it hasn't come back on
(yet?). I'm guessing that, if there are slip rings in the steering column that
connect to the airbag, that maybe they had some dirt and/or oxidation on them
that caused the resistance to increase temporarily (???). Just guessing here.

I'll post again if/when the light comes back on. Wish me luck.

Jred
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Old 06-30-2007, 10:01 PM   #11
dbond
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update: replaced airbag control module, coded it at the indy shop and problem is solved! my pocket is $370 lighter.
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Old 06-30-2007, 10:28 PM   #12
TX
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Does anyone know if I can take the airbag control module out of another E46 and use it without having the dealer or an indy do any retrofit coding? Does it matter if the used control module has been used to deploy airbags?
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Old 06-30-2007, 10:45 PM   #13
dbond
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I think you need a brand new module for proper coding. If it has been in an accident and airbags deployed you are 100% out of luck as the crash data is stored in the microprocessor.
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Old 07-09-2007, 07:12 AM   #14
dominicanodcora
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Quote:
Originally Posted by dbond View Post
update: replaced airbag control module, coded it at the indy shop and problem is solved! my pocket is $370 lighter.
how much was the airbag control module??
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Old 01-15-2008, 03:03 AM   #15
yusiff
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Thumbs down Airbag Control Unit

Hi Help Please
I Have a E46 318i 1999 4 door saloon, Airbag light remains on, took it to main dealer and i need a new Airbag control unit. does anyone know where it is located on THIS MODEL? (Important as may be elsewhere on other models)i can get one at a fraction of the price that the delears charge but need to get the serial numbers off it.
Many thanks
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Old 01-17-2008, 10:35 AM   #16
dbond
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The location it identical across the board - center console, under drink holders for US model. It's the storage bin for EU models. You need to remove the center console and cut the carpet in order to remove the module.
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Old 11-07-2008, 08:31 PM   #17
cmacg76
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I have the same problem and the BMW dealership want 340 to replace the control unit. Can anyone suggest where to buy a control unit from?
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Old 11-07-2008, 09:22 PM   #18
dutchcrunch
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air bag modules

there are companys that can repair yours, in us dollars its around 55 dollarss for all bmw
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Old 11-07-2008, 09:31 PM   #19
dutchcrunch
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airbag module reprogram

Hello CMACG76, they are in uk talk with them, for the price you cnnot beat it and if its not the problem you are not out of lots of money.



http://airbagmodulerepair.com/
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Old 04-04-2009, 06:58 PM   #20
HakyB
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hi did a ny1 manage to find out what the fualt was on fualt code 01, 01 as i have just had it come up on my car....the night before i insulated my boot to stop vibrantions from my subwoofer...i insulated behind the grey carparts on the walls of the boot and undt the parcel self and the nxt morning i got the airbag light on withe the fualt code 01,01 ..is the linked or just coincdence..?? thanks and were can i get a control unit from??
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