Sebring convertible 1998

Anti-theft won't prevent you from turning the key in the cylinder, it will either set off an alarm, IE horn and lights, or not allow the car to start, or both, (on your Sebring, it's both). If you are having trouble with the door locks, the tumblers are worn. I had this problem on a 1998 Sebring that I just bought for my daughter. I removed and disassembled the driver's door lock and repaired it myself, but it's a job that takes patience because of the very small parts involved. If it is the ignition lock cylinder, it may be either the steering wheel or shifter lock binding. Try moving the steering wheel back and forth and then the shifter while attempting to turn the key. If that doesn't do it, then the key cylinder itself is probably worn out and would need to be replaced. Good luck!