Oxygen Sensor for 2004-2009 Mazda 3 - Walker 250-54029

Walker Products 250-54029 oxygen sensor for the 2004-2009 Mazda 3 4-cylinder 2.0L and the 2006-2009 3 4-cylinder 2.3L measures the amount of oxygen in the exhaust gas to show combustion efficiency. This Walker Products oxygen sensor is a 4-wire wide-band air-fuel ratio unit for the upstream position.

• Determines the oxygen content of the exhaust gas and monitors the air-fuel ratio for combustion efficiency
• Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
• Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust
• Electrodes made of a gas-permeable platinum layer
• Monitors exhaust gases to help reduce pollutants

Quick facts

• Part: Walker Products 250-54029 oxygen sensor
• Fits: 2004-2009 Mazda 3 4-cylinder 2.0L and the 2006-2009 3 4-cylinder 2.3L
• Position: Upstream
• Condition: New

A failing oxygen sensor can show up as rough running, higher fuel consumption, higher exhaust emissions or a lit malfunction indicator light. Before you replace the sensor, rule out physical damage to its wiring harness and connector, which can also shorten a sensor's life. Newer vehicles store fault codes, and some of them may relate to the sensor.

Fits

This direct-fit replacement fits the 2004-2009 Mazda 3 L4-2.0L and the 2006-2009 Mazda 3 L4-2.3L. This listing is one sensor, and either engine takes a single upstream sensor.

Specifications