Walker 242-1332 Ignition Knock (Detonation) Sensor

OE Knock Sensor for Mazda Applications

Walker 242-1332 is an OE replacement ignition knock sensor built to monitor engine vibration and report detonation events to the ECU. It is engineered for direct replacement in select Mazda vehicles, including Mazda 3, CX-3, MX-5 Miata, Mazda 6, and CX-5 applications.

Walker Products Sensor Only line focuses on direct-fit emission control sensors that match factory-style electrical and mounting requirements. Part number 242-1332 is built for the original threaded location and factory connector style, making it a practical choice for restoring knock detection on gasoline engines.

Key Features

• OE replacement ignition knock (detonation) sensor
• Engine vibration monitoring for spark knock detection
• Matched frequency range, sensitivity, and electrical output
• Heat- and oil-resistant construction for engine-block environments
• Direct-fit design with factory-style electrical connection
• Terminal Type: Spade
• Connector Quantity: 1
• Connector Shape: Rectangle
• Terminal Quantity: 2
• Connector Gender: Female
• Terminal Gender: Male

Detailed Description

Walker 242-1332 is designed to detect knock or detonation by reading engine vibration and sending the signal to the ECU, which then adjusts ignition timing in real time. That control helps prevent spark knock that can lead to internal engine damage, reduced fuel economy, and drivability concerns. This sensor is tuned to OE specifications so it can respond to the resonant frequency expected by the engine platform.

Compatible With 2014-2018 Mazda 3, N/A; 2016-2018 Mazda CX-3, N/A; 2016-2018 Mazda MX-5 Miata, N/A; 2014-2017 Mazda 6, N/A; and 2013-2017 Mazda CX-5, N/A. If you are searching for a Mazda 3 knock sensor replacement or a Mazda CX-5 ignition knock sensor, Walker 242-1332 is built for those applications.

Common Issues This Part Can Address

• Diagnostic trouble codes such as P0325 or P0330
• Audible spark knock or detonation under load
• Incorrect ignition timing response from the ECU
• Reduced fuel economy caused by knock-related timing changes
• Rough drivability tied to failed knock sensor input

Installation Notes and Tips

Install the sensor in the original threaded location and connect it using the factory-style terminal interface. Confirm the connector shape, terminal count, and mounting point before installation. For best results, inspect the harness and surrounding engine surfaces for damage, corrosion, or contamination that could affect signal quality.

Quality Assurance

Walker Products builds this Sensor Only knock sensor as an OE replacement component for gasoline engine applications. Part number 242-1332 is engineered to match factory fitment and signal characteristics for reliable knock detection.