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.
Walker Products 350-64037 Air Fuel Ratio Oxygen Sensor - 4-Wire
Walker Products 350-34521 Oxygen Sensor 4-Wire Direct Fit Narrow-Band
Walker Products 350-34052 Oxygen Sensor 4-Wire Direct Fit Narrow-Band
Walker Products 350-34322 Oxygen Sensor 4-Wire Heated Direct Fit Narrow-Band
DENSO 234-4765 Oxygen Sensor 4-Wire Heated Direct Fit O2 Sensor
Dorman 904-7033 Air Inlet Manifold Absolute Pressure (MAP) Sensor HD Solutions
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.