Front Oxygen Sensor for 1999-2003 Mazda Protege & More - Walker 350-34080

Walker Products 350-34080 front oxygen sensor for the 1999-2000 Mazda Protege 4-cylinder 1.8L, the 2001-2003 Protege 4-cylinder 2.0L and other vehicles measures the oxygen content of the exhaust gas to track combustion efficiency. This Walker Products oxygen sensor is made for its specific application and fitment position, and it returns the diagnostic feedback the ECU needs.

• Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
• Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas
• Monitors exhaust gases and helps reduce pollutants
• Electrodes with a gas-permeable platinum layer
• Narrow-band design with 4 wires

Quick facts

• Part: Walker Products 350-34080 oxygen sensor
• Fits: 1999-2000 Mazda Protege 4-cylinder 1.8L, the 2001-2003 Protege 4-cylinder 2.0L and other vehicles
• Position: Downstream front
• Condition: New

A failing sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the check engine light. Those signs alone do not prove the sensor is at fault, and a vacuum leak is another common source of rough running, so find the cause first.

Fits

It also fits the 2002-2003 Mazda Protege5 4-cylinder 2.0L and the 2000-2001 Mazda MPV V6 2.5L, which each take one sensor. This listing is one sensor.

Specifications

Product information is for general reference and may contain errors. See our Disclaimer.