Nearly all vehicles produced from 1998 onward, will have a transponder chip in the key. What’s a transponder chip?

A transponder chip is a small, radio frequency powered (in most cases) chip, that sits in the head of your key. When the key is inserted / turned in your ignition, the chip communicates to the immobiliser of your vehicle, turning off the security and allowing your vehicle to start.


The chip MUST be programmed specifically to the vehicle that it’s required to start. This is achieved via diagnostics equipment of some degree and transponder chips that are already programmed to one vehicle CANNOT be used to start any other vehicle.

replacement transponder car keys in palm of hand