Oxygen Sensor for 2004-2005 Mazda 3 & More - Bosch 13770

Bosch 13770 oxygen sensor for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles measures the oxygen left in the exhaust gas. This downstream Bosch O2 sensor sends air-fuel-ratio readings to the ECU.

• Narrow-band, heated switching-type sensor
• Reaches operating temperature in under 10 seconds for quick closed-loop control
• Withstands exhaust gas temperatures up to 1,880°F
• Metal housing and integrated heater element, with TSP coating to resist vibration, corrosion and contamination

Quick facts

• Part: Bosch 13770 oxygen sensor
• Fits: 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles
• Position: Downstream
• Material: Metal housing
• Condition: New

A worn downstream oxygen sensor can show up as a check engine light or poor fuel economy, but many other faults light the same lamp. With the engine off and cool, look over the sensor's wiring and connector for cracks or melted insulation first; a shop can test the signal while the engine runs. If the sensor is the cause, this one replaces it.

Fits

This sensor is a direct-fit replacement for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and the 2006-2007 Mazda 5 4-cylinder 2.3L. The downstream position takes one sensor on either car, and this listing is one sensor.

Specifications

In the box

One oxygen sensor with its wiring harness. A mounting bracket is not included.

Installation notes

• Conductive anti-seize is pre-applied to the threads.
• The connector is direct-fit for quick installation.