Walker 242-1025 Ignition Knock (Detonation) Sensor

Walker 242-1025 Knock Sensor Overview

Walker Products 242-1025 is an ignition knock sensor built for vehicles that need accurate detonation detection and stable engine management feedback. It is a direct-fit style replacement for select Audi, Volkswagen, Mitsubishi, and Porsche applications, including Audi A4, Audi A6, Volkswagen Passat, and Volkswagen Golf models.

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering support focused on meeting OEM standards and specifications. The Walker Products line includes engine management parts such as cam and crank sensors, throttle position sensors, oxygen sensors, and fuel system components.

Key Features

• Ignition knock (detonation) sensor for engine timing feedback
• Walker Products part number 242-1025
• 3-terminal blade connection with 1 female rectangular connector
• Wiring harness included with a 483.0000-length harness
• Blue-harness applications noted in multiple Audi and Volkswagen listings
• Fits select Audi A4, Audi A6, Volkswagen Passat, Volkswagen Golf, and related models

Detailed Description

This Walker knock sensor is specified for a wide range of European applications, including Fits 1996-2000 Audi A4, N/A; Fits 1995-1999 Audi A6, N/A; and Fits 1998-2001 Volkswagen Passat, N/A. It is also listed for Fits 1990-1998 Volkswagen Golf, N/A and Fits 1990-1998 Volkswagen Jetta, N/A, making it a practical replacement for vehicles that rely on precise knock detection to help the engine control system manage ignition timing.

Walker Products 242-1025 is built with a rectangular female connector, three male blade terminals, and an included wiring harness. Application notes vary by vehicle, with some listings calling out a 535mm blue harness or sensor-only configuration. This part cross-references Bosch 0261231036 and Standard Ignition KS15 for the same application.

Common Problems This Sensor Can Address

• Knock sensor fault codes
• Audible spark knock or detonation-related drivability concerns
• Erratic ignition timing feedback to the engine control module
• Check engine light conditions tied to knock sensor circuit faults
• Failed or damaged original sensor harness connections

Installation Notes and Tips

Verify the vehicle’s engine code, chassis breakpoints, and harness style before ordering, since several listings specify blue-harness or sensor-only configurations. Confirm connector shape, terminal count, and harness length against the original part. For best results, inspect the mounting surface and wiring routing before installation, and compare the old sensor to Walker Products 242-1025 before final fitment.

Quality Assurance

Walker Products states that its engine sensor and fuel system components are manufactured to meet or exceed OEM standards and specifications. The company supports production with in-house manufacturing, product management, engineering, technical documentation, and application data control, and it operates as an ISO 9001/IATF16949 certified manufacturer.