Walker Products 350-34544 oxygen sensor for the 2006-2009 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles measures combustion efficiency from the amount of oxygen in the exhaust gas. It is a downstream, narrow-band sensor built for its specific application and fitment position.
- Electrodes made of a gas-permeable platinum layer
- Sensor monitors exhaust gases to help reduce pollutants
- Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
- Electrode coating guards against contamination and erosion from combustion residue and exhaust particulates
Quick facts
- Part: Walker Products 350-34544 oxygen sensor
- Fits: 2006-2009 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can show up as a poorly running engine, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Those signs alone do not prove this sensor is the problem, since an exhaust leak can give similar symptoms. With the engine off and cool, you can look over the sensor, wiring harness and connector for physical damage.
Fits
This works as an oxygen sensor replacement for the 2006-2009 Mazda 3 4-cylinder 2.0L or 2.3L and for the 2009 Mazda 3 Sport 4-cylinder 2.0L.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
Build and materials
- Type: Narrow-band, direct fit
- Wires: 4
- Condition: New
In the box
One oxygen sensor per listing; the downstream position takes one sensor.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the oxygen sensor for a 2008 Mazda 3 4-cylinder 2.0L or 2.3L?
Yes. Walker Products 350-34544 is a downstream oxygen sensor for the 2006-2009 Mazda 3 4-cylinder 2.0L or 2.3L, so the 2008 model year is covered.
Is this Walker Products oxygen sensor a narrow-band type?
Yes. Walker Products 350-34544 is a narrow-band sensor with four wires and a direct-fit design.
Is part 350-34544 an upstream or downstream sensor?
This one is a downstream sensor. The listing is a single sensor, and the downstream position takes one.
Can a worn narrow-band oxygen sensor raise fuel consumption?
Yes, it can be one cause. A failing sensor may also show up as rough running or a lit malfunction indicator light.
What does the coating on this oxygen sensor protect?
The coating on the electrode surfaces helps keep combustion residue and exhaust particulates from contaminating or eroding them. The electrodes themselves are a gas-permeable platinum layer.
