Walker 242-1125 Ignition Knock (Detonation) Sensor

Walker 242-1125 Knock Sensor Overview

Walker Products 242-1125 is an ignition knock sensor for select Audi and Volkswagen applications. It is built to meet or exceed OEM standards and specifications, with application-specific fitment details that matter when replacing a sensor on the 2000-2002 Audi TT, TT Quattro, Golf, and Jetta.

Key Features

• Ignition knock (detonation) sensor for engine management systems
• Walker Products line backed by in-house manufacturing, engineering, and product management
• Built to OEM-level standards and specifications
• Brown sensor body with 235 mm harness length on listed applications
• Direct-fit coverage for select Audi TT, Audi TT Quattro, Volkswagen Golf, and Volkswagen Jetta models

Product Details

The Walker Products 242-1125 knock sensor monitors engine vibration so the control system can respond to detonation-related conditions. This helps maintain proper ignition timing control on covered Audi and Volkswagen vehicles. Walker Products has supplied fuel system and engine sensor components since 1946 and supports its catalog with engineering and technical documentation for accurate vehicle application coverage. This part cross-references Standard Ignition KS223 for the same application.

Vehicle Fitment

• Fits 2001-2002 Audi TT Quattro, N/A. Brown color with a harness length of 235mm.; Walker Products
• Fits 2001 Audi TT, N/A. Brown color with a harness length of 235mm.; Walker Products
• Fits 2000 Audi TT, N/A. From Chassis/VIN 8N-Y-050 001, color brown, with a harness length of 235mm.; Walker Products
• Fits 2000 Audi TT Quattro, N/A. From Chassis/VIN 8N-Y-050 001, color brown, with a harness length of 235mm.; Walker Products
• Fits 2000 Volkswagen Golf, N/A. Brazil Built Vehicle; Color-Brown; Harness Length 350mm; Walker Products
• Fits 2000 Volkswagen Jetta, N/A. Brown color with a harness length of 235mm.; Walker Products
• Fits 2001-2002 Volkswagen Golf, N/A. Brown color with a harness length of 235mm.; Walker Products
• Fits 2001 Volkswagen Jetta, N/A. From Chassis/VIN 9M-1-027 493; Color-Brown; Harness Length 235mm; Walker Products
• Fits 2001 Volkswagen Jetta, N/A. Chassis/VIN 9M-1-075 840, Brown, Harness Length 235mm.; Walker Products
• Fits 2002 Volkswagen Jetta, N/A. Brown color with a harness length of 235mm.; Walker Products

Common Replacement Reasons

• Knock sensor fault codes
• Engine pinging or detonation under load
• Reduced ignition timing control
• Rough running caused by inaccurate knock detection
• Check engine light related to sensor performance

Installation Notes

Verify the chassis/VIN breakpoints and harness length before ordering, especially on 2000-2001 Volkswagen Jetta and 2000 Audi TT/TT Quattro applications. Match the brown sensor configuration shown in the fitment notes and confirm the connector routing before installation. Use the vehicle service information for torque and diagnostic procedures.

Quality Assurance

Walker Products is an ISO 9001/IATF16949 certified manufacturer with long-standing experience in fuel system components and engine sensors. The 242-1125 is produced to support OEM-style fitment and specification control for covered Audi and Volkswagen applications.