Question about 1988 BMW 5 Series

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Bad Relay Airbag showing on the Dashboard

Can you tell me where the airbag relay might be located in my 1997 BMW 540i? The airbag is showing on my dashboard and this is preventing the horn and the components on my steering wheel from working.

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  • mark brown
    mark brown May 11, 2010

    The air bag system runs hard wired straight from the Air bag control unit, but this sounds like a posible fault with the slip ring positioned behind the steering wheel, check to make sure you have no damaged or disconected wires under the upper steering colume covers as the air bag lights would not stop other components from working. hope this is of some help, regards Mark.

  • joe May 11, 2010

    was curious if you power seats (both sides) still work. if they don't look underneath the seats to see if something has become unplugged. if you find something, it might also fix your airbag light, at least that was the case on a friend's 3 series. if the light doesn't clear, then you will need the dealer's help to clear the code.

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  • 78 Answers

Hey,
take a look at www.airbagmodul.com

They're working in Airbag-Simulators and Occupancy Sensor-Simulators.

Regards

Gerrit

Posted on Aug 17, 2010

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I think you may have a bad/sticking horn switch, which is part of the drivers airbag module. if there are no concerns with the speed control or airbag lamp on, the clock spring in the column is ok.

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since an airbag is involved, I would recommend a dealer check this part. Airbags are dangerous.

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You can always try the steps outlined in this video to replace the horn pad. to see if this is your issue if you have exhausted all of your other resources.

Or You can try these steps to further diagnose your issues:

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