Walker 242-1400 Ignition Knock (Detonation) Sensor - Left

Walker Sensor Only Knock Sensor 242-1400

Walker Products Sensor Only ignition knock sensor 242-1400 monitors engine vibration so the ECU can adjust ignition timing when detonation is detected. It is an OE replacement for direct-fit service on select Buick applications, including 2005 Buick LaCrosse and 2004-2005 Buick Rendezvous, left position.

Key Features

• OE replacement knock sensor tuned for engine-specific knock frequency response
• Matches OE specifications for sensitivity and electrical output
• Heat- and oil-resistant construction for engine-block and cylinder-head environments
• Factory-style oblong female connector with 2 blade terminals
• Includes wiring harness and mounting hardware for direct replacement service
• 8.00 threaded end diameter for original threaded mounting locations

Product Details

The Walker Sensor Only line focuses on direct replacement engine management components built to restore original sensor function without changing the vehicle’s factory calibration strategy. Part number 242-1400 is engineered to detect knock events at the resonant frequency expected by the engine control system, helping the ECU retard spark timing in real time when detonation occurs. That response helps protect internal engine components and maintain stable drivability. This part number 242-1400 is a practical replacement choice when servicing a Buick LaCrosse or Buick Rendezvous with a failed knock sensor circuit.

What It Helps Fix

• 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
• Driveability concerns tied to a faulty knock sensor signal

Installation Notes

Fits 2005 Buick LaCrosse, N/A. Fits 2004-2005 Buick Rendezvous, Left. Verify the threaded mounting location, connector shape, and terminal style before installation. Clean the mounting surface and inspect the harness connector for corrosion or damaged terminals. The included harness supports factory-style connection at the original sensor location.

Quality Assurance

Walker knock sensors are built to OE replacement standards for fit, frequency response, and electrical output. The Sensor Only line is designed for direct installation into original threaded locations using factory-style terminals, supporting consistent knock detection on gasoline engine applications.