Oxygen Sensor for 2011-2013 Mazda 3 & More - DENSO 234-4505

DENSO Auto Parts 234-4505 oxygen sensor for the 2011-2013 Mazda 3 4-cylinder 2.5L and other vehicles measures the oxygen left in the exhaust. It is a heated, narrow-band sensor for the downstream position, and it sends that reading to the engine computer.

• Laser-welded stainless housing resists corrosion
• PTFE filter blocks contaminants under harsh engine conditions
• Dual-layer protection shields the ceramic element for fast, reliable response
• DENSO's exclusive aluminum oxide trap layer protects the ceramic element from silicone and lead poisoning
• Heated, narrow-band sensor with four wires and a 15.83 in wiring harness

Quick facts

• Part: DENSO Auto Parts 234-4505 oxygen sensor
• Fits: 2011-2013 Mazda 3 4-cylinder 2.5L and other vehicles
• Position: Downstream
• Condition: New

A worn oxygen sensor can show up as a check engine light, poorer fuel economy or a rough idle. Before you replace the sensor, rule out an exhaust leak near it, damaged wiring or a connector problem, because a sensor code does not always mean the sensor itself is bad.

Fits

It is a direct-fit replacement for the 2011-2013 Mazda 3 4-cylinder 2.5L and the 2012-2013 Mazda 3 Sport 4-cylinder 2.5L, and the same part works as an oxygen sensor for the 2012-2015 Mazda 5 4-cylinder 2.5L. Each takes one, and this listing is one sensor.

Specifications