Walker 242-1131 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for Audi and Volkswagen

Walker Products 242-1131 is an ignition knock sensor built for select Audi and Volkswagen applications. It is a direct-fit engine sensor solution for vehicles that need accurate detonation detection to help the engine control system respond properly under load.

Key Features

• Ignition knock (detonation) sensor for engine management systems
• Walker Products engine sensor line backed by in-house manufacturing and engineering support
• Manufactured to meet or exceed OEM standards and specifications
• Blue sensor body with a 540 mm harness length on listed applications
• Fits select Audi A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, and Volkswagen Passat models

Product Details

Walker Products 242-1131 is part of the Walker Products engine sensor lineup, a product line focused on fuel system and engine management components. Walker has supplied automotive aftermarket parts since 1946 and maintains ISO 9001/IATF16949 certification, with product engineering and technical support supporting application accuracy. This knock sensor is listed for 2000-2006 Volkswagen Passat, 2001-2006 Audi A4, 2001-2006 Audi A4 Quattro, 2002-2004 Audi A6, 2002-2004 Audi A6 Quattro, and 2003-2005 Audi Allroad Quattro. This part cross-references Standard Ignition KS221 for the same application.

Common Issues It May Address

• Knock sensor fault codes
• Audible pinging or detonation under acceleration
• Reduced engine performance from incorrect knock feedback
• Check engine light related to detonation sensing
• Unstable ignition timing control

Installation Notes and Tips

Verify the connector style, harness length, and sensor location against the original part before installation. For fitment, use the vehicle listing exactly as shown: Fits 2001-2006 Audi A4, N/A; Fits 2001-2006 Audi A4 Quattro, N/A; Fits 2003-2005 Audi Allroad Quattro, N/A; Fits 2000-2005 Volkswagen Passat, N/A; Fits 2002-2004 Audi A6, N/A; Fits 2002-2004 Audi A6 Quattro, N/A; Fits 2003-2004 Audi A6 Quattro, N/A. Confirm the blue color and 540 mm harness length where noted in the application data.

Quality Assurance

Walker Products manufactures engine sensors to meet or exceed OEM standards and specifications. The company supports production with its own manufacturing, product management, and engineering staff, and operates under ISO 9001/IATF16949 certification.