Walker 242-1345 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE-Style Engine Control

Walker 242-1345 is a Sensor Only ignition knock sensor built for OE replacement use on select Nissan and INFINITI applications. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when detonation is detected.

With factory-style fitment and a 2-terminal spade connection, this Walker knock sensor is made for direct replacement in the original threaded location. It is a practical choice for diagnosing knock sensor fault codes, timing concerns, and drivability issues on vehicles such as the Nissan Altima, Murano, Pathfinder, and INFINITI QX50.

Key Features

• Walker Sensor Only line for OE replacement applications
• Part number 242-1345
• Ignition knock (detonation) sensor for gasoline engine management systems
• Matches OE frequency range, sensitivity, and electrical output
• 2-terminal spade design with square female connector
• Built with heat- and oil-resistant materials for engine bay conditions
• Direct-threaded installation in the original sensor location

Product Details

Walker Products engineers this knock sensor to detect the resonant frequency associated with engine knock on the specified platform. That signal allows the ECU to reduce spark advance in real time, helping protect the engine from detonation-related damage and unstable combustion. The Sensor Only product line focuses on direct OE-style replacement parts for vehicles that require accurate sensor response and factory-style electrical connection.

Part number 242-1345 is listed for a wide range of Nissan and INFINITI models, including 2019-2025 Nissan Altima, 2020-2026 Nissan Murano, 2023-2025 Nissan Pathfinder, 2023-2025 INFINITI QX50, and 2022-2026 INFINITI QX60. It also applies to additional Nissan platforms such as Frontier, Kicks, Maxima, Rogue, Sentra, TITAN, TITAN XD, Versa, and Versa Note.

Common Issues This Part Addresses

• Knock sensor fault 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 timing retard events
• Rough drivability related to failed knock detection

Installation Notes and Tips

Verify the connector style, terminal count, and threaded mounting location before installation. This sensor uses a square female connector with two male spade terminals, so the factory harness must match the OE-style connection. Clean the mounting surface and inspect the engine block or cylinder head threads before installing the sensor to ensure accurate vibration transfer.

Fits 2019-2025 Nissan Altima, N/A; fits 2020-2026 Nissan Murano, N/A; fits 2023-2025 Nissan Pathfinder, N/A; fits 2023-2025 INFINITI QX50, N/A; fits 2022-2026 INFINITI QX60, N/A.

Quality Assurance

Walker knock sensors are built to OE specifications for frequency range, sensitivity, and electrical output, with materials selected for heat and oil resistance in engine-mounted applications. Part number 242-1345 is designed for direct replacement use on the listed Nissan and INFINITI vehicles.