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how do you disable the immobiliser on my vauxhall astra . ?

my car wont start and a guy told me it was the immobiliser,the battery is up to full power and he said it wasnt the starter, could some one tell me how to disable it completely as it is up for mot on monday morning the 27th of july thanks
roy dempsey, July 2009
More details of the car would help, the astra has been around a long time.
What are the symptoms? Was it running OK before, has it been sitting a while, have you checked the timing belt, is the engine turning over on the starter at the usual speed?
Does the immo or engine management light flash when you turn on the ignition?
If not it's unlikely to be the immo at fault.
Even if it is flashing it's unlikely to be the immo as such, more likely to be a problem with the chip in the key.
Try the spare key.
If you dont have a spare open the key you have and make sure the chip is in place.

cal777, July 2009
link Click here to see other fixes for Vauxhall Astra.