Keep the ECU listening for spark knock with the Walker Products Ignition Knock (Detonation) Sensor 242-1037. This OE-replacement knock sensor monitors engine vibration frequencies to detect detonation, allowing the ECU to retract ignition timing in real time and help prevent internal engine damage, reduced fuel economy, and drivability issues. It drops in as a direct-fit replacement for the 1998 Subaru Forester (H4-2.5L), 1997-1998 Subaru Impreza (H4-1.8L, H4-2.2L, H4-2.5L), and 1997-1999 Subaru Legacy (H4-2.2L, H4-2.5L).
- OE-Replacement Sensitivity: Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- Exact OE Fit: Installs into the original threaded mounting location using factory-style connectors—no modifications required.
- Built for Harsh Environments: Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
- Detects Engine Knock: Monitors vibration to detect detonation and support proper ignition timing.
Features a single blade terminal with a female oblong connector and an included wiring harness measuring 108 mm. If a failed knock sensor is the cause of a P0325 or P0330 fault code, this unit restores proper knock detection. Mounting hardware is not included. Country of origin: United States.
Interchange: 213-1826 · 158-0919 · 83.517 · 144-744
2131826 · 1580919 · 83517 · 144744 · 5S2295 · S8684 · 65017 · 550621 · 60246 · KS39 · J5677002 · 2KNC0014 · KNS0005 · 7517614 · 87614 · ID0199 · 149KNS00117 · KS96 · KS96T · 70040 · 22060AA061 · SU4989 · 0907099
This part cross-references / interchanges with the following part numbers:
213-1826, 5S2295, S8684, 158-0919, 65017, 550621, 60246, 83.517, KS39, J5677002, 2KNC0014, KNS0005, 7517614, 144-744, 87614, ID0199, 149KNS00117, KS96, KS96T, 70040, 22060AA061, SU4989, 0907099
