What is a transponder key?


The transponder element in your key

The word transponder is made up of two words: Transmitter and Responder.

You may be familiar with the word transponder as it relates to avionics. A transponder in an airplane receives pulses from the ground control tower and then replies with a set of coded pulses in order to identify itself.

A car transponder works in a similar way. When the key is turned in the ignition, the electronic chip that is mounted in the head of the key receives a set of pulses from the ECU (Engine Control Unit). In return, the transponder key replies with a set of coded pulses. These pulses are evaluated by the ECU. If the pulses match with what the on-board-car-computer expected to receive the car will start- if not the car won’t start.

For more information about the transponder car key please check here: Transponder Car Key After a new transponder key is made it has to be programmed. S.A. Locksmith & Security technicians are using the latest locksmith programming equipment. This allows them to program the electronic chip, in the transponder key, to the code required by your car.

If you need a replacement key made, please call S.A. Locksmith & Security, any time. We are always open! Our friendly dispatchers are on duty 24/7, 365 days, ready for your call.