Walker 242-1372 Ignition Knock (Detonation) Sensor

OE Knock Sensor for Mercedes-Benz Applications

Walker 242-1372 is a Sensor Only ignition knock sensor built for OE replacement use on select Mercedes-Benz vehicles. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when detonation is detected, helping maintain smooth operation and protect internal engine components.

This Walker Products Sensor Only line focuses on direct-fit replacement sensors engineered to match OE frequency range, sensitivity, and electrical output. The result is a knock sensor that installs in the original threaded location and uses a factory-style electrical connection for service on Mercedes-Benz AMG, Sprinter, Metris, CLA250, and GLA250 applications.

Key Features

• Ignition knock (detonation) sensor for engine vibration monitoring
• OE replacement design for precise knock detection and timing control
• Matched for frequency range, sensitivity, and electrical output
• Heat- and oil-resistant construction for engine-block and cylinder-head environments
• Rectangle connector with 1 female connector, 2 male spade terminals
• Walker 242-1372 direct-fit sensor for factory-style installation

Product Details

Walker Products 242-1372 is part of the Sensor Only line, a product line focused on replacement sensors that restore factory knock detection performance without changing the original engine management strategy. On vehicles such as the Mercedes-Benz AMG GT 63, C63 AMG, GLC63 AMG, SL63 AMG, Sprinter 2500, and CLA250, accurate knock sensing is critical because the ECU relies on this input to manage ignition timing under load and during changing combustion conditions.

This part cross-references Bosch (e.g., 0261231234) for the same application.

Common Issues This Part Can Address

• Knock sensor fault codes such as P0325 or P0330
• Erratic ignition timing caused by inaccurate detonation feedback
• Engine pinging or spark knock under acceleration or load
• Reduced drivability from a failed or weak knock sensor signal
• Loss of proper ECU timing correction on Mercedes-Benz turbo and AMG engines

Installation Notes

Install Walker 242-1372 in the original threaded sensor location and connect it using the factory-style terminal layout. Verify the connector shape, terminal type, and vehicle-specific fitment before installation. For Mercedes-Benz GLA250 and CLA250 applications, note the fitment exclusions listed in the catalog data, including harness-related notes where shown.

Quality Assurance

Walker knock sensors are built to OE specifications for signal response and durability, using materials selected to withstand heat and oil exposure in the engine bay. The design supports accurate ECU knock control across the listed Mercedes-Benz applications, including AMG performance models and select Sprinter and Metris vehicles.