The Walker Products Ignition Knock (Detonation) Sensor (part number 242-1040) is a direct-fit replacement for 1992-2004 Lexus and Toyota vehicles with 3.0L, 4.0L, and 3.4L 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.
- Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
- Restores Ignition Timing Accuracy:Â Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
Specifications:
| Number of Terminals | 1 |
| Connector Type | Blade |
| Connector Shape | Square |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 1992-2004 Lexus and Toyota models including ES300, GS300, GS400, LS400, RX300, SC400, 4Runner, Avalon and more — 3.0L, 4.0L, and 3.4L 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: Forecast KS19, NTK ID0166, Delphi AS10019, Lexus 8961512040, KEM 144-717, Holstein 2KNC0063, Tomco Products 29008, Wells SU4040 and 6 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.
