Transponder Key: Description

The Sentry Key Immobilizer System (SKIS) uses transponder chip that is integral to each ignition key (Fig 1 ) to communicate with the Sentry Key Immobilizer Module (SKIM). Ignition keys are supplied with the vehicle when it is shipped from the factory. The transponder chip is undermolded within the head of the key. This undermold is hidden beneath an overmolded rubber cap.

Fig 1: Sentry Key Immobilizer Transponder

Courtesy of DAIMLERCHRYSLER CORP.