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 234-9049 Air Fuel Ratio Sensor 4-Wire Heated O2 Sensor
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.