Walker 242-1284 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE-Style Engine Control

Walker Products part 242-1284 is an OE replacement ignition knock sensor built to monitor engine vibration and report detonation events to the ECU. It is a direct-fit sensor for the 2005 Saab 9-2X, Sensor Only, with factory-style electrical connection details for straightforward replacement.

Walker Sensor Only products focus on the sensor component itself, making this line a practical choice when the original knock sensor has failed and the vehicle needs accurate knock detection restored without changing unrelated engine control parts.

Key Features

• OE replacement ignition knock (detonation) sensor
• Engine vibration monitoring for spark knock detection
• Frequency range and sensitivity matched to OE specifications
• Electrical output tuned for the target engine platform
• Heat- and oil-resistant construction for engine-block environments
• Factory-style spade terminal with 1 connector, 1 terminal, female connector gender, and male terminal gender
• Direct-fit replacement for the 2005 Saab 9-2X, Sensor Only

Detailed Description

Walker 242-1284 is engineered to detect the resonant vibration signature associated with knock or detonation, allowing the engine control unit to adjust ignition timing in real time. That response helps maintain proper combustion control and supports stable engine operation in gasoline applications where precise timing feedback is required. The oblong connector shape and single spade-style terminal layout are designed to match the original electrical interface on the listed application.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

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 inaccurate knock feedback
• Drivability concerns related to failed knock sensor input

Installation Notes and Tips

Fits 2005 Saab 9-2X, Sensor Only. Confirm the original connector style, terminal layout, and threaded mounting location before installation. Clean the mounting surface and inspect the harness connector for corrosion or damage so the replacement sensor can transmit an accurate signal to the engine control system.

Quality Assurance

Walker Products builds this knock sensor as an OE replacement component with specifications aligned to the original frequency response, sensitivity, and electrical output required by the application.