A transponder is a self-contained unit consisting of a tiny microprocessor and radio receiver/ transmitter.
Transponders are embedded in the plastic head of a car key and do not need a battery to power them. Each transponder’s chip has a code unique to a specific car or VIN (vehicle identification Number).
When a key is placed in the ignition a code is sent from the ECU (engine control unit) to the transponder. The transponder transmits a code to the ECU. If the code is not recognized the car will not start.
Transponders were introduced in 1994 by vehicle manufactures in an attempt to combat the rise in vehicle crime, joy riders, and car thieves and virtually make hot wiring a thing of the past.
In the event of losing or having your Transponder Keys stolen, contact a specialist for your replacement car keys.