Walker 242-1351 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE Replacement

Walker 242-1351 is a Sensor Only ignition knock sensor built for OE replacement service on select Ford, Lincoln, and Mercury applications. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when detonation is detected.

Walker Products Sensor Only line focuses on direct-fit replacement sensors that match factory electrical and frequency requirements. This helps restore accurate knock detection on vehicles such as the Ford Mustang, Ford Explorer, and Mercury Grand Marquis.

Key Features

• OE replacement ignition knock (detonation) sensor
• Engine vibration monitoring for knock detection and timing correction
• Engineered to match OE frequency range, sensitivity, and electrical output
• Heat- and oil-resistant construction for engine bay conditions
• Black plastic housing with factory-style female connector
• Wiring harness included for direct replacement service
• Exact OE fitment for threaded mounting locations
• Part number: 242-1351

Detailed Description

Walker 242-1351 is designed to detect the resonant vibration pattern associated with spark knock so the engine control unit can reduce timing advance when needed. That function helps protect internal engine components and keeps ignition control operating as calibrated by the factory. The sensor uses a ring terminal design, oblong connector shape, 4 terminal quantity, and 2 connector quantity, with a 460 length and 8.45 mounting hole diameter for OE-style installation.

This Sensor Only product line is built for direct replacement use on gasoline engines where accurate detonation feedback is required. It is a practical choice for diagnosing knock sensor fault codes, restoring timing control, and maintaining drivability on Ford Mustang, Ford Explorer, and related applications. Part number 242-1351 is also referenced by technicians looking for a replacement knock sensor that matches original electrical behavior.

What It Helps Resolve

• Knock sensor fault codes such as P0325 or P0330
• Erratic ignition timing caused by inaccurate detonation feedback
• Spark knock or pinging under load
• Reduced fuel economy from timing being held back
• Drivability concerns tied to failed knock detection

Installation Notes and Tips

Install the sensor in the original threaded location and connect it using the factory-style electrical interface. Verify the mounting surface is clean and free of corrosion before installation. Because no gasket or seal is included, reuse or replace any engine-side sealing components as required by the vehicle service procedure. Confirm the connector, mounting hole diameter, and harness routing match the original part before final assembly.

Compatible With select 2002-2010 Ford, Lincoln, and Mercury vehicles, including Fits 2005-2009 Ford Mustang, N/A; Fits 2002-2005 Ford Explorer, N/A; Fits 2002-2006 Ford Crown Victoria, N/A; Fits 2003-2005 Lincoln Aviator, N/A; Fits 2002-2005 Mercury Mountaineer, N/A; Fits 2002-2006 Mercury Grand Marquis, N/A; Fits 2003-2004 Mercury Marauder, N/A; Fits 2007-2010 Ford Explorer Sport Trac, N/A.

Quality Assurance

Walker Products manufactures OE replacement sensors to match factory specifications for frequency response, sensitivity, and electrical output. That specification-driven approach supports consistent knock detection across the listed Ford, Lincoln, and Mercury applications.