Walker 242-1285 Ignition Knock (Detonation) Sensor

Walker Knock Sensor for OE Replacement

Walker Products Ignition Knock (Detonation) Sensor 242-1285 is an OE replacement sensor that monitors engine vibration and sends the signal the ECU uses to adjust ignition timing. For a 2005 Saab 9-2X knock sensor replacement, this part helps restore accurate detonation detection and factory-style engine control.

Walker Sensor Only line components are built to OE specifications for frequency range, sensitivity, and electrical output. Part number 242-1285 is engineered for direct fitment in the original threaded location and uses a factory-style electrical connection for a clean replacement on the 2005 Saab 9-2X.

Key Features

• OE replacement ignition knock sensor for gasoline engine management systems
• Matched frequency response and sensitivity for precise knock detection
• Heat- and oil-resistant construction for engine block and cylinder head environments
• Factory-style oblong connector with 1 female connector and 1 male spade terminal
• Direct-fit design for original threaded mounting locations
• Walker 242-1285 for accurate replacement service

Detailed Description

The knock sensor is a critical input for the engine control system. When detonation is detected, the ECU can reduce spark advance to protect the engine and maintain drivability. Walker 242-1285 is tuned to the resonant knock frequency of the application so the control module can react with the correct timing strategy. This makes it a practical choice for a 2005 Saab 9-2X knock sensor repair when diagnosing timing irregularities, spark knock, or related fault codes.

Walker Products Sensor Only parts are focused on OE-style replacement fitment and electrical performance. The 242-1285 sensor is built to mount in the original location and connect through the factory-style terminal layout, helping maintain proper signal transfer to the ECU.

What It Helps Fix

• Knock sensor fault codes such as P0325 or P0330
• Audible spark knock or detonation under load
• Retarded ignition timing caused by a failed sensor signal
• Reduced fuel economy from incorrect timing control
• Drivability concerns related to inaccurate knock detection

Installation Notes

Install 242-1285 in the original threaded sensor location and verify the connector style before installation. Clean the mounting surface and inspect the harness for damage or corrosion so the new sensor can transmit an accurate vibration signal. For a 2005 Saab 9-2X, confirm the engine application and connector match before final assembly.

Quality Assurance

Walker Products designs this sensor to OE specifications for frequency range, sensitivity, and electrical output, with materials selected for heat and oil exposure in engine-mounted service. This part cross-references Monroe Shocks & Struts (e.g., 172286) for the same application.