The Walker Products Ignition Knock (Detonation) Sensor (part number 242-1035) is a direct-fit replacement for 1990-1997 Subaru vehicles with 2.2L, 2.5L, and 3.3L 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:
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
- Detects Engine Knock:Â Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- 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.
Specifications:
| Number of Terminals | 1 |
| Connector Type | Blade |
| Connector Shape | Circle |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 1990-1997 Subaru models including Impreza, Legacy, and SVX — 2.2L, 2.5L, and 3.3L 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 KS33, NTK ID0197, Standard Import 70038, KEM 144-734, Hitachi Astemo KNS0004, Wells SU4988, Bosch F00E000541, SMP KS86 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.
