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astra 2003?

have put a new battery in my key but still wont open my car, even though the light comes on. please help.
DEBBIE, March 2010
The usual key reset procedure is-

Turn ignition on (dash lights on but dont start engine), push button on keyfob, doors should lock then unlock, key should now work as normal.

gerber, March 2010
link Click here to see other fixes for Astra.