Bosch 16161 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Bosch Actual OE Oxygen Sensor for Nissan and INFINITI

Bosch 16161 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in downstream applications on select Nissan and INFINITI vehicles, including Maxima, Murano, Altima, Pathfinder, Quest, Juke, and QX60.

Key Features

• Actual OE Oxygen Sensor from Bosch Actual OE Oxygen Sensor line
• Narrow-band heated O2 sensor for downstream monitoring
• Specific-fit design with 4-wire harness and rectangular male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Wiring harness included for direct replacement on listed applications
• Bosch part number 16161 for OE-style service identification

Product Details

Bosch developed its oxygen sensor technology from early thimble-style designs to planar narrowband sensors that respond quickly and measure lambda accurately during closed-loop operation. This Bosch 16161 sensor uses a heated narrow-band design to help the engine control module read exhaust oxygen content more consistently after startup and during normal driving. It is a direct-fit replacement for downstream left, downstream right, and downstream positions on the listed Nissan and INFINITI applications, including 2016-2021 Nissan Maxima, 2015-2019 Nissan Murano, and 2016-2020 INFINITI QX60. Bosch 16161 is built for vehicles that need OE-level signal accuracy and durable performance under heat and vibration.

This part cross-references Nissan 226A0BV81B for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings sent to the ECU
• Rough or unstable combustion control after sensor aging
• Slow closed-loop response during warm-up and driving
• Emissions test failures caused by a worn downstream sensor

Installation Notes and Tips

Verify the exact position before ordering, since this sensor is listed for downstream left, downstream right, and downstream locations depending on vehicle and model year. Confirm the connector shape, 4-wire layout, 18 mm thread size, and threaded mounting style match the original sensor. Use proper oxygen sensor service tools and inspect the exhaust bung threads before installation. For Nissan Altima, Murano, Pathfinder, Quest, Juke, Maxima, and INFINITI QX60 applications, match the year and position exactly to the fitment table.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The sensor uses advanced ceramic elements, controlled heating, and heat-resistant materials to maintain consistent signal quality in harsh exhaust environments.

Compatible Fitment

• Fits 2016-2021 Nissan Maxima, downstream left.
• Fits 2016-2020 INFINITI QX60, downstream left.
• Fits 2015-2019 Nissan Murano, downstream left.
• Fits 2015-2018 Nissan Altima, downstream right.
• Fits 2016-2018 Nissan Pathfinder, downstream left.
• Fits 2015-2017 Nissan Quest, downstream right.
• Fits 2016 Nissan Juke, downstream.
• Fits 2015 INFINITI QX60, downstream left.
• Fits 2015 Nissan Juke, downstream.
• Fits 2015 Nissan Pathfinder, downstream left.
• Fits 2014 Nissan Altima, downstream right.