Left Oxygen Sensor for 1996-2000 Nissan Pathfinder & More - Bosch 13257

Bosch 13257 left oxygen sensor for the 1996-2000 Nissan Pathfinder V6 3.3L and other vehicles sends air-fuel-ratio readings to the ECU. This Bosch premium oxygen sensor is a switching-type, narrow-band heated unit that helps the ECU control combustion and reduce emissions.

• Switching-type design gives the ECU precise air-fuel-ratio feedback
• Withstands exhaust streams up to 1,880°F
• Metal housing, integrated heater element and TSP coating resist vibration, corrosion and contamination
• Bosch O2 sensor reaches operating temperature in less than 10 seconds for quick closed-loop control

Quick facts

• Part: Bosch 13257 oxygen sensor
• Fits: 1996-2000 Nissan Pathfinder V6 3.3L and other vehicles
• Position: Downstream left
• Material: Metal housing
• Condition: New

A check-engine light, rough running or poor fuel economy can come from a worn oxygen sensor, but they can have other causes too. With the engine off and cool, look over the wiring and connector for melted insulation or damage before you replace the sensor. A shop can test it with the engine running.

Fits

This oxygen sensor fits the 1996-2000 Nissan Pathfinder V6 3.3L and the 1997-2000 Infiniti QX4 V6 3.3L. Each takes one on this side.

Specifications

In the box

One oxygen sensor with its wiring harness; a mounting bracket is not included. This listing is one sensor for the downstream left position, and the other side is ordered separately.

Installation notes

• Pre-applied conductive anti-seize is on the threads.
• Direct-fit connectors are made for quick installation.