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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, May-24-2018, 01:30:46 PM   #1
Hredlus
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Default SRS fault and airbag light

Hi all. I have an 04 M3 that I made the mistake of bragging to a buddy saying it has been trouble free for its entire life.... a week later, airbag light comes on. Anyway, after some investigation and a diagnostic, Iím pulling codes for seatback locks on driver and passenger seat causing the light. Shop says itís not likely that both seatback locks (which are working fine) would both fail.

Shop wanted instead to replace the SRS module, 900.00. Nuts to that.

Has anyone had same issue, and if so, thoughts or resolution?

Mine is a low miles (64k) and babied, never beaten on, so no abuse ever.

Any feedback appreciated.

Hal


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Old Thu, May-24-2018, 01:41:15 PM   #2
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Default Re: SRS fault and airbag light

I think that would be the seat belt pre-tensioner. Itís on the inboard side of the seats.

Airbag lights are usually straightforward. Either the tensioners are bad, wiring is bad or thereís a loose connector.

Did you get water down the side of the seats? Spill coffee or something?


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Old Thu, May-24-2018, 02:51:19 PM   #3
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Default SRS fault and airbag light

Quote:
Originally Posted by bigjae1976 View Post
I think that would be the seat belt pre-tensioner. Itís on the inboard side of the seats.

Airbag lights are usually straightforward. Either the tensioners are bad, wiring is bad or thereís a loose connector.

Did you get water down the side of the seats? Spill coffee or something?


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Nope. Car is as perfect as can be, unmolested, and no spills. Actually was getting it ready to sell, so this is probably cars attempt to force me to keep it so it can go on with itís easy life. Hah

Anyway, shop in town took a crack at it because my diagnostic tool was not helping, and his final head scratcher was to just swap out the SRS control module at 900.00 and see if that does it.

I donít really feel like a 900.00 gamble.

Any thoughts would be awesome. The error is for the seat back locks, not the belt tensioner... and oddly both drivers and passenger failed at same time. He said thatís not likely. Also, I should add, he said the seatback locks are working fine.

Hal


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Old Thu, May-24-2018, 02:54:22 PM   #4
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Default Re: SRS fault and airbag light

You can get a used module for $50-$100 at most. I wouldnít pay more than $20-$30 for one.

Post a WTB ad here...plenty of track guys have removed that stuff from their car.


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Old Thu, May-24-2018, 02:56:53 PM   #5
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Default Re: SRS fault and airbag light

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Originally Posted by bigjae1976 View Post
You can get a used module for $50-$100 at most. I wouldnít pay more than $20-$30 for one.

Post a WTB ad here...plenty of track guys have removed that stuff from their car.


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Is this the module that sits behind the shifter in center under armrest? Also, heard something about them needing to be programmed and that was 200. Any thoughts on that?


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Old Thu, May-24-2018, 03:03:39 PM   #6
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Default Re: SRS fault and airbag light

listen to bigjae, I just had this same issue when I swapped out interiors, it's likely the pre-tensioner
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Old Thu, May-24-2018, 03:04:42 PM   #7
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Default Re: SRS fault and airbag light

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listen to bigjae, I just had this same issue when I swapped out interiors, it's likely the pre-tensioner


Fantastic! Thanks for this! Appreciate it!


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Old Thu, May-24-2018, 03:28:54 PM   #8
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Default Re: SRS fault and airbag light

Get under your seats, make sure no loose connectors, re-set the light, and I can almost guarantee that it won't be back. These tings are wonky and tend to illuminate these lights for no reason.
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Old Thu, May-24-2018, 03:46:41 PM   #9
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Default SRS fault and airbag light

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Originally Posted by Texaz3 View Post
Get under your seats, make sure no loose connectors, re-set the light, and I can almost guarantee that it won't be back. These tings are wonky and tend to illuminate these lights for no reason.


Yeah the shop removed seats and confirmed all wires and voltages were good. No shorts, etc.

Danged thing. Swear my car has ears and heard me thinking of selling.


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Last edited by Hredlus; Fri, May-25-2018 at 01:02:05 AM.
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Old Thu, May-24-2018, 10:54:31 PM   #10
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Default Re: SRS fault and airbag light

I recently took my car out of storage after 6-7 months to an SRS light. with 7-8 codes relating to everything including the ecm and are all not clear-able. I have ordered a used SRS unit for under $50 and will report
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Discussing e46 M3 Tire Sizing Thread in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)