Subaru Legacy Emission Control Sensors
Emission control sensors are a popular pick among Subaru Legacy owners here, covering models from 1990 through 2024. The range includes oxygen sensors, air/fuel ratio sensors, mass air flow sensors, knock sensors, MAP sensors, and throttle position sensors — in direct-fit and OE replacement forms. Select your year above and we'll show only the emission control sensors that fit your Subaru Legacy. Fitment is checked against our vehicle data for every part listed.
Standard Motor Products KS98 Ignition Knock Sensor with Wiring Harness
NGK 24696 NTK Air/Fuel Ratio Sensor Oxygen Sensor 4-Wire M18x1.5
NGK 24664 Air/Fuel Ratio Sensor 4-Wire Heated Oxygen Sensor 18mm
NGK 24598 NTK OE Type Oxygen Sensor O2 Sensor, 4-Wire Heated, 18mm Thread
NGK NTK 24614 OE Identical Oxygen Sensor, 3-Wire Heated O2 Sensor
Representative Photo, actual item may vary
Spectra Premium OS5331 Downstream Oxygen Sensor Narrow-Band Heated O2 Sensor
Walker Products 250-23091 Oxygen Sensor Direct Fit Narrow-Band 3-Wire
NGK 24576 NTK Oxygen Sensor O2 Sensor, 4-Wire Heated, 18mm Thread
Representative Photo, actual item may vary
What's here for your Subaru Legacy
- Oxygen sensors — threaded, direct-fit replacements for upstream and downstream positions
- Air/fuel ratio sensors — OE-style replacements for the wideband sensing positions
- Ignition knock (detonation) sensors — manifold-mount and direct-fit styles
- Mass air flow sensors — OE replacement and remanufactured units
- Manifold absolute pressure (MAP) sensors — direct-fit and universal options
- Throttle position sensors — direct-fit replacements across a wide model year span
The widest selection here comes from DENSO, Walker Products, Standard Motor Products, and Delphi. Other categories Subaru Legacy owners shop for: Subaru Legacy Springs and Suspension Parts, Subaru Legacy Shocks and Struts and Subaru Legacy Brake Pads and Shoes, or browse all Subaru Legacy parts and accessories.