Subaru WRX STI Emission Control Sensors
This page brings together emission control sensors for the Subaru WRX STI covering model years 2013–2021, including oxygen sensors, mass air flow sensors, air/fuel ratio sensors, and ignition knock sensors available in direct-fit and OE replacement styles. Select your year above and we'll show only the emission control sensors that fit your Subaru WRX STI. Fitment is checked against our vehicle data for every part listed.
Spectra Premium OS5331 Downstream Oxygen Sensor Narrow-Band Heated O2 Sensor
Representative Photo, actual item may vary
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What's here for your Subaru WRX STI
- Oxygen Sensors — including direct-fit and universal options for upstream and downstream manifold positions
- Mass Air Flow Sensors — OE replacement units in a range of fitments
- Air / Fuel Ratio Sensors — direct-fit designs sized for the WRX STI application
- Ignition Knock (Detonation) Sensors — OE-style replacement sensors
The widest selection here comes from DENSO, Walker Products, NTK Oxygen Sensors, and Bosch, each offering a broad range of emission control sensors across the 2013–2021 model years. Other categories Subaru WRX STI owners shop for: Subaru WRX STI Springs and Suspension Parts, Subaru WRX STI Shocks and Struts and Subaru WRX STI Manual Transmission Parts, or browse all Subaru WRX STI parts and accessories.