ZDK9003B is a universal brake light switch specifically designed for the four major brands under the Volkswagen Group (Volkswagen, Audi, Skoda, and SEAT). Manufactured in strict compliance with original equipment specifications, it features a dual-circuit design that simultaneously controls the brake light signal and the vehicle's ECU system signal. With plug-and-play installation, it effectively resolves common issues such as abnormal brake lights, cruise control failure, and transmission lock-up.
Compatible Brands: Volkswagen (VW), Audi, Skoda, SEAT
Original Equipment (OE) Numbers:
3B0 945 511 B｜3B0 945 511 C｜3B0 945 511 A｜3B0 945 511 D
3B0 945 511｜1K2 945 511｜8E0 945 515｜7L6 945 511
Connector Type: 4-pin standard interface
Operating Mode: Dual-contact synchronous output (normally open/normally closed combination)
Record fault codes and disconnect the battery before installation.
When removing the old switch, ensure the plunger remains in the reset position.
After installing the new switch, manually test the smoothness of the plunger travel.
Connect a diagnostic tool to check the brake signal and ECU communication status.
Conduct a road test to verify the restoration of cruise control functionality.
Common Corresponding Faults:
Brake lights staying on or not illuminating
Instrument cluster displaying "Brake Light Fault"
Cruise control unable to activate
Gear shift lock-up in automatic transmission models
ESP system false warnings
