Walker 242-1481 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE Replacement

Walker 242-1481 is a Sensor Only ignition knock sensor built for OE replacement use on select Hyundai and Kia applications. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when knock is detected, helping protect the engine and maintain consistent drivability.

This Walker Products Sensor Only line focuses on direct-fit replacement sensors that match factory electrical and frequency requirements. For vehicles such as the Hyundai Sonata, Hyundai Santa Fe, Hyundai Palisade, and Kia K5, the goal is accurate knock detection with factory-style connection points and OE-style mounting.

Key Features

• Part number: 242-1481
• Brand line: Sensor Only
• Ignition knock (detonation) sensor for engine control systems
• OE replacement design with matched frequency range, sensitivity, and electrical output
• Black plastic housing
• 1 bolt hole mounting design
• 3-pin oblong connector with male connector gender and female terminal gender
• 8 terminal quantity, blade terminal type
• No mounting hardware, gasket or seal, wiring harness, thread sealer, or mounting bracket included

Detailed Description

Walker 242-1481 is engineered to detect the resonant vibration pattern associated with engine knock so the ECU can reduce spark advance in real time. That function helps prevent spark knock-related damage, supports smoother operation, and keeps ignition timing under control under load. The Sensor Only product line is focused on direct OE-style replacement, with fitment and electrical characteristics tuned for the original engine platform.

Built with heat- and oil-resistant materials, this knock sensor is made for the demanding environment of the engine block or cylinder head. It installs into the original threaded location and uses a factory-style electrical connection for a clean replacement on 2021-2026 Hyundai Sonata, 2024-2026 Hyundai Santa Fe, 2026 Hyundai Palisade, and 2021-2024 Kia K5 applications. The Walker 242-1481 part number is also useful when diagnosing knock sensor fault codes such as P0325 or P0330.

Common Issues This Part Can Address

• Knock sensor fault codes
• Erratic ignition timing control
• Spark knock or detonation detection concerns
• Reduced fuel economy caused by timing correction
• Drivability problems related to failed knock sensing

Installation Notes and Tips

Confirm the original sensor location, connector style, and engine application before installation. Clean the mounting surface and inspect the threaded bore for damage or contamination before threading in the replacement sensor. Because no gasket, seal, or wiring harness is included, reuse or replace related components as needed based on the vehicle condition. For Hyundai Sonata, Hyundai Santa Fe, Hyundai Palisade, and Kia K5 service work, verify the diagnostic trouble code and wiring integrity before replacing the sensor.

Quality Assurance

Walker Products builds this OE replacement knock sensor to match factory specifications for frequency response, sensitivity, and electrical output. The design uses durable materials selected for heat and oil exposure in engine-mounted locations, supporting reliable knock detection across the listed gasoline applications.