Walker Products 350-34154 rear oxygen sensor for the 2003-2005 Mazda 6 4-cylinder 2.3L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. This Walker Products oxygen sensor is a narrow-band, 4-wire, direct-fit design.
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
- Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
- Made for its specific application and fitment position, with the diagnostic feedback the ECU requires
Quick facts
- Part: Walker Products 350-34154 oxygen sensor
- Fits: 2003-2005 Mazda 6 4-cylinder 2.3L and other vehicles
- Position: Upstream, upstream rear
- Condition: New
Rough running, higher fuel use, more exhaust emissions or a lit malfunction indicator light can mean a failing sensor, though other faults may also be behind them. With the engine off and cool, look over the sensor, its wiring harness and the connector for physical damage first, since damage there can shorten the sensor's life.
Fits
It is a direct-fit replacement oxygen sensor for the 2003-2005 Mazda 6 4-cylinder 2.3L and the 2001-2002 Mazda Millenia V6 2.5L.
Specifications
Fit and size
- Position: upstream rear
- Quantity per vehicle: 1
- Thread: M18 - 1.5
- Number of wires: 4
Build and materials
- Type: narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Condition: new
In the box
One oxygen sensor. Both fitments call for a single sensor in this position.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Will this oxygen sensor fit the 2003-2005 Mazda 6 4-cylinder 2.3L?
Yes. Walker Products 350-34154 is listed for the 2003-2005 Mazda 6 4-cylinder 2.3L as an upstream rear sensor, and that position takes one.
Does the 2001-2002 Mazda Millenia V6 2.5L take this oxygen sensor?
Yes. The 2001-2002 Mazda Millenia V6 2.5L is also listed for this sensor, and it needs one in the same upstream rear position.
What thread size and wire count does this oxygen sensor have?
Walker Products 350-34154 has an M18 - 1.5 thread and four wires. It is a narrow-band, direct-fit sensor.
What does the coating on the electrodes of this oxygen sensor do?
The coating keeps combustion residue and particulates in the exhaust gases from contaminating or eroding the electrode surfaces. The electrodes themselves are made of a gas-permeable platinum layer.
Is this rear oxygen sensor sold as a single piece?
Yes. This listing is one sensor, and the fitment calls for a single sensor in this position.
