Walker 242-1334 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE-Style Engine Control

Walker 242-1334 is a Sensor Only ignition knock sensor built for OE replacement service on select Mercedes-Benz applications. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when detonation is detected.

With factory-style electrical connection points and OE-matched sensing characteristics, this Walker knock sensor supports accurate knock detection on Mercedes-Benz AMG GT, C63 AMG, G63 AMG, GLA45 AMG, and related models.

Key Features

• Ignition knock (detonation) sensor for engine vibration monitoring
• OE replacement design with frequency range and sensitivity matched to original equipment
• Factory-style fitment for direct installation into the original threaded location
• Heat- and oil-resistant construction for engine bay conditions
• Spade terminal type, 1 connector, 2 terminals
• Female connector with male terminals and rectangular connector shape
• Walker part number 242-1334 for catalog and service reference

Product Details

Walker Products Sensor Only line focuses on replacement sensors that match OE specifications for electrical output and resonant frequency. This knock sensor is tuned to detect the specific vibration pattern associated with engine knock, allowing the ECU to reduce spark advance when detonation occurs. That control helps protect internal engine components and maintain stable drivability.

Part number 242-1334 is used on a wide range of Mercedes-Benz performance and luxury models, including 2014-2021 CLA45 AMG, 2015-2020 C63 AMG S, 2016-2020 C63 AMG, 2017-2021 AMG GT, 2018-2020 GLC63 AMG, and 2019-2020 G63 AMG. It also covers additional Mercedes-Benz applications such as G550, GLE580, GLS580, S560, S580, and AMG GT variants.

Common Issues This Sensor Can Address

• Knock sensor fault codes such as P0325 or P0330
• Erratic ignition timing caused by inaccurate knock detection
• Spark knock or detonation under load
• Reduced fuel economy from incorrect timing correction
• Drivability concerns related to failed engine vibration feedback

Installation Notes

Verify the original connector style, terminal count, and threaded mounting location before installation. This is a sensor only part, so confirm whether your vehicle uses a separate harness. Several listed Mercedes-Benz applications note “Exc.Harness; Sensor Only,” which means the harness is not part of this component.

For fitment reference, this part fits 2017-2021 Mercedes-Benz AMG GT, 2018-2021 Mercedes-Benz AMG GT C, 2014-2021 Mercedes-Benz CLA45 AMG, 2016-2021 Mercedes-Benz G550, and 2015-2019 Mercedes-Benz GLA45 AMG. It also fits 2020-2021 Mercedes-Benz GLE580 and GLS580, plus 2018-2020 Mercedes-Benz S560 and S63 AMG applications.

Quality Assurance

Walker knock sensors are engineered as OE replacement components and built from heat- and oil-resistant materials for demanding engine environments. The design follows original equipment specifications for sensing range, sensitivity, and electrical output to support accurate knock detection across the listed Mercedes-Benz fitments.