Spectra OS5172 Oxygen Sensor - Downstream Left

Spectra OS5172 Oxygen Sensor

The Spectra OS5172 oxygen sensor is a direct-fit emission control replacement for select Nissan and INFINITI applications. It is built with engineering, manufacturing, and quality control processes aimed at matching or exceeding original equipment performance.

Key Features

• Direct replacement oxygen sensor for emission control service
• Designed for downstream left placement
• OE-style fitment for select 2001-2003 Nissan Pathfinder and 2002-2003 INFINITI QX4 applications
• Built to support accurate exhaust gas monitoring and engine management feedback
• Part number OS5172 for easy identification

Detailed Description

Use the Spectra OS5172 when replacing a downstream left oxygen sensor on a 2001 Nissan Pathfinder from August 2000, a 2002 Nissan Pathfinder, or a 2002-2003 INFINITI QX4. This sensor is part of the emission control system and helps the vehicle’s engine computer monitor exhaust conditions after the catalytic converter. This part cross-references Bosch 13651 for the same application.

For buyers searching for a 2002 Nissan Pathfinder downstream left oxygen sensor or a 2002-2003 INFINITI QX4 downstream left O2 sensor, OS5172 provides a fitment-specific replacement option. The Spectra OS5172 is also referenced by part number OS5172 in catalog and service lookup use.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings reported to the engine control module
• Emission test failures caused by a worn sensor
• Rough or inconsistent fuel control from inaccurate sensor feedback
• Service replacement for a damaged or aging downstream left sensor

Installation Notes and Tips

Install in the downstream left position only for the listed applications. Confirm connector style, sensor routing, and exhaust location against the original part before installation. Clear diagnostic trouble codes after replacement and verify system operation with a scan tool if required.

Quality Assurance

Spectra Premium states that its oxygen sensors are produced with engineering, manufacturing technology, and quality control intended to meet or exceed original equipment performance for the parts they replace.