Walker 242-1478 Ignition Knock (Detonation) Sensor

OE Replacement Knock Sensor for Hyundai

Walker 242-1478 is an OE replacement ignition knock sensor built to monitor engine vibration and detect detonation events in real time. It is engineered for direct replacement on select Hyundai Elantra and Hyundai Kona applications, including 2021-2026 Hyundai Elantra and 2023-2026 Hyundai Kona.

Key Features

• OE replacement ignition knock (detonation) sensor
• Matches OE frequency range, sensitivity, and electrical output
• Blade terminal design with 1 oblong female connector and 2 male terminals
• Built with heat- and oil-resistant materials for engine-block and cylinder-head environments
• Direct-fit replacement for factory threaded mounting locations
• Walker 242-1478 supports precise knock detection and ignition timing control

Product Details

Walker Sensor Only line focuses on direct-fit sensor replacement parts for engine management systems. Part number 242-1478 is tuned to detect the resonant frequency associated with knock in the covered Hyundai applications, allowing the ECU to adjust ignition timing when detonation is present. That helps maintain proper combustion control and supports stable drivability in everyday gasoline engine operation. The factory-style electrical connection and OE-style mounting make this a practical replacement when servicing a failed knock sensor or diagnosing a knock sensor fault on a Hyundai Elantra or Hyundai Kona.

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

What It Helps Address

• Knock sensor fault codes such as P0325 or P0330
• Erratic ignition timing caused by inaccurate knock detection
• Spark knock or detonation-related drivability concerns
• Reduced fuel economy linked to improper timing correction
• Engine protection issues when the ECU cannot detect knock events correctly

Installation Notes

Install Walker 242-1478 in the original threaded sensor location and connect it using the factory-style terminal interface. Verify the connector shape, terminal count, and sensor location before installation. For Hyundai Elantra and Hyundai Kona service, confirm the vehicle year and engine configuration against the listed fitment before replacing the sensor.

Quality Assurance

Walker knock sensors are built to OE specifications for fitment and signal response, with materials selected to withstand heat and oil exposure in the engine bay. Part number 242-1478 is designed as a direct replacement for the listed Hyundai applications and is backed by Walker’s OE replacement manufacturing standards.