TRANSPONDER KEYS

What is a transponder key?

• A transponder key or ‘chip key’ is an automotive key designed to prevent vehicle theft. When the ignition is switched on the on-board computer or ECM (electronic control module) transmits a radio frequency which is received by the transponder chip. The transponder chip in return then sends out a coded signal which is read by the on-board computer of the vehicle. If the coded signal is correct the vehicle will then start.
• Many people who have transponder keys are unaware because the chip is inside the plastic head of the key