Mazda 3 Emission Control Sensors
Emission control sensors are a popular pick among Mazda 3 owners here, covering model years 2004–2025 with options ranging from oxygen sensors and mass air flow sensors to air/fuel ratio, knock, and manifold absolute pressure sensors. Choose your model year above and this page keeps only the emission control sensors that fit your Mazda 3. Each listing is matched to our vehicle fitment data before it appears here.
DENSO 234-4839 Heated Oxygen Sensor 4-Wire Direct Fit 12.44" Wiring Harness
Spectra Premium OS5458 Oxygen Sensor Downstream Heated 4-Wire Zirconia
Walker Products 350-34693 Oxygen Sensor Direct Fit Downstream O2 Sensor
Walker Products 350-34449 Oxygen Sensor 4-Wire Direct Fit Narrow-Band
Walker Products 350-64019 Air Fuel Ratio Oxygen Sensor 4-Wire Heated
Walker Products 350-34133 Oxygen Sensor 4-Wire Direct Fit Narrow-Band
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Walker Products 245-1621 Mass Air Flow Sensor OEM Replacement
Representative Photo, actual item may vary
What's here for your Mazda 3
- Oxygen sensors — direct-fit and OE replacement styles
- Mass air flow sensors — including remanufactured and new units
- Air/fuel ratio sensors — direct-fit replacements for the exhaust manifold and bung positions
- Ignition knock (detonation) sensors — OE-style replacements
- Manifold absolute pressure (MAP) sensors — direct-fit and universal options
The widest selection here comes from DENSO, Walker Products, Bosch, and Spectra, each offering a broad range of direct-fit and OE replacement parts across the full 2004–2025 model span. Other categories Mazda 3 owners shop for: Mazda 3 Springs and Suspension Parts, Mazda 3 Shocks and Struts and Mazda 3 Brake Rotors and Drums, or browse all Mazda 3 parts and accessories.