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    The car alarm system in my 1998 Holden Astra hatch activates for no reason, what could be the problem?

    Holden Holden Advice Holden Astra Holden Astra Advice Holden Astra 1998

    The car alarm system in my 1998 Holden Astra hatch activates for no reason, what could be the problem?

    Answered by CarsGuide
    11 November 2021
    David Morley

    Holden Astras of this vintage have been known to suffer false alarms from the security system, and it seems as though a re-flash or replacement of the ECU (on-board computer) is the ultimate fix. In many other cases, false alarms are the result of faulty switches and sensors, but the Astra’s track record suggests the computer will be the culprit. At which point you have a decision to make which may involve disabling the alarm system altogether (make sure you advise your insurance company if you go down this road).

    This model Astra was also infamous for a radio that could turn itself on (independent of the ignition system) and flatten the battery.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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