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My dealer disconnected the battery on my 2005 Chrysler Crossfire to replace a blown radio speaker (duh???) and when the battery was reconnected, the ignition key would not start the engine. They think the key was deprogrammed.  Of course I never received a spare key when I bought the car from this same dealer, so I am waiting while a new key is delivered from somewhere in Texas. (I am in Vancuver BC) Has anyone experienced such a problem before, any suggestions?  I am not entirely sure that a new key will solve the problem.