This bypasses the faulty buckle switches in pre July 1997 models which triggers the airbag light. We are going to simply add a 100 ohm resistor into the system to make the airbag computer think the seat belts are always latched. But, you will need an SRS code reader to reset the Airbag/SRS fault light once done.īoth selt belt buckle switches are designed to provide the SRS computer with either 100 ohms resistance if the seat belt is latched, or 400 ohms if the seat belt is unlatched. It'll cost you $2, 6" of electrical tape, and about 10 minutes. Also, the wiring is different in those cars. It looks like in July 1997 the 318ti got the updated "hall effect" belt buckle switch which was more reliable, so you probably don't have this issue. From the best I can tell this DIY will only apply to 318ti cars made in June 1997 and earlier (** or even earlier, see responses below** ). If you have an Airbag/SRS red light on your dash and the code comes back to either (or both) the passenger or driver side seat belt buckle switch, here's how you can fix it for good.
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