Volkswagen 5C7959839AXSH Engine Start Stop Switch Assembly

This engine start stop switch is a direct replacement for the factory-installed push button ignition switch on select Volkswagen Jetta models. It features a 4-pin connector interface and is designed for left-hand drive vehicles equipped with the KESSY (Keyless Entry, Start, and Exit) system. The switch assembly consists of a black plastic housing with a silver momentary push button actuator. It mounts in the center console or dashboard area and communicates with the vehicle's immobilizer and body control module to authorize engine cranking. The part replaces multiple OEM reference numbers including 5C7959839A, 5C7959839B, 5C7959839C, 5C7959839B3Q7, 5C7959839C3Q7, and 16D959839. No programming is required for installation; it is a plug-and-play component.