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Anti theft system beeps constantly on a 03 z4

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Sounds like you have an after market alarm system. Normally a factory alarm will not have a shock sensor. Its probably the shock sensor causing the constant beeping. If you think this is the case you can normally find the shock sensor under the drivers side dash secured to the steering column. It will probably have a light inside that comes on when it detects vibration. There will be an adjustment to make it more or less sensitive. Hope this helps.

Posted on Oct 04, 2009

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