The Ignition Key (Transponder)

The ignition key for PASS-key III(R) equipped vehicles is a typical looking ignition key with a transponder located in the plastic end of the key. The transponder value is fixed and unable to be changed. The PASS-Key III(R) system uses the ignition key transponder value to determine if a valid ignition key is being used to start the vehicle. There are approximately 3 trillion possible transponder values. There are no visible electrical contacts. The keys may be identified by the letters "PK3" stamped into the steel shank of the key. PASS-Key III(R) systems use the following types of ignition keys: