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Old 27th October 2010, 09:57   #33
WeeMan
Posted a thing or two
 
Mazda MX5, BMW 520i

Join Date: Feb 2007
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Check the wiring going into the inertia switch!. Easiest way is to remove the glovebox to get right into the wiring (4 torx screws at top, 3 hidden under mat in glovebox). Press the rubber button on top and you should feel a small straight gap, thats where the switch would pop up!. Now make sure the wiring connector is TIGHT.
I had the same symptoms and this was the culprit.....like you say, drives you nuts!
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