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E36 General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.

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Unread 02-16-2008, 08:31 PM   #1
David Mc
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Name: David Mc
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Join Date: Nov 2007
Location: Queensland, Australia
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Your Ride: 1998 e36 328i
SRS/ Airbag light - Seat Occupancy sensor

After the Airbag light tripped on my 98 328i I diagnosed the problem, which was a defective passenger seat occupancy sensor. Naturally I ordered a replacement, but could not bear looking at that annoying light on the cluster every time I drive the car over the next 3 - 4 weeks until the repalcement sensor arrives.

Resetting the SRS/Airbag system was not an option as it immediately re-tripped due to the defective sensor still being in circuit.

After a bit of digging I found this link and built the little circuit, which I then soldered to the leads cut from the defective sensor (I used a 1N4004 diode as I didn't have a 1N4001 on hand). Viola ! the airbag light now works as it should.

I thought that I would post this as I know others have similar problems (the downside is that BOTH airbags will trip if one is deployed, regardless of whether the passenger seat is occupied until the sensor is replaced).

Last edited by David Mc; 02-16-2008 at 08:32 PM..
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