The Walker Products Ignition Knock (Detonation) Sensor (part number 242-91050) is a direct-fit replacement for 2002-2019 INFINITI, Nissan, and Smart vehicles with 5.6L, 3.5L, and 2.5L engines. Walker Products Knock Sensors are OE Replacement components that detect engine detonation to help the ECU adjust timing and prevent internal engine damage.
Features:
- Detects Engine Knock:Â Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
- Restores Ignition Timing Accuracy:Â Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
- Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
Specifications:
| Number of Terminals | 2 |
| Connector Type | Blade |
| Connector Shape | Rectangle |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 2002-2019 INFINITI, Nissan, and Smart models including QX56, Altima, Armada, Cube, Frontier, Maxima, NP300, NV200 and more — 5.6L, 3.5L, and 2.5L engines.
Confirm the year, make, model, and engine against your vehicle before ordering. Full application data is shown in the fitment lookup on this page.
Interchanges With: NTK ID0252, ERA 550611, Peugeot 1607578480, Renault 7701065379, Standard Import 19592, smart 1321530128, smart A1321530128, Tomco Products 29231 and 26 more
WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm.
