how do you replace the ignition lock cylinder assembly, the keys will no longer on 2003 Honda Civic

can turn the key to get the steering wheel unlocked but not far ebough to start the car

Asked by for the 2003 Honda Civic
New key(s) and immobilizer receiver will need to be programmed , OR , before you put the new switch in , have it re-keyed (locksmith) for the CARS ORIGINAL key , AND swap over the receiver ring from original lock.
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Not too difficult. Be sure to have a drill, drill bits and a bolt extractor set :