Bosch 18137 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Bosch Validated Oxygen Sensor for Nissan and INFINITI

Bosch Part Number 18137 is a narrow-band heated oxygen sensor built for downstream applications on select Nissan and INFINITI vehicles. It provides precise air-fuel-ratio feedback to the ECU, helping maintain stable combustion control and lower emissions during normal driving conditions.

The Bosch Validated Oxygen Sensor line combines OE-based engineering with durable materials, optimized heater control, and fast sensor response for consistent closed-loop operation. This Bosch 18137 oxygen sensor is a direct-fit replacement for specific downstream locations on models such as the Nissan Altima, Nissan Juke, Nissan Murano, Nissan Pathfinder, Nissan Quest, Nissan 370Z, and INFINITI Q50, Q70, QX50, and QX60.

Key Features

• Specific-fit Bosch oxygen sensor for downstream placement
• Narrow-band heated design for faster light-off and quicker closed-loop operation
• 4-wire configuration with rectangular male connector and female terminals
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included with 12.3 in harness length and 14.7638 in wire length
• Standard replacement grade for OE-style service work
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions

Product Details

Bosch developed this switching-type oxygen sensor from decades of OE sensor engineering, starting with its original oxygen sensor designs and later advancing to planar narrowband technology. The result is a sensor that responds quickly to exhaust changes, supports accurate lambda control, and maintains reliable performance under heat and vibration. Part Number 18137 is a practical choice when replacing a downstream oxygen sensor on Nissan Altima, Nissan Juke, Nissan Murano, Nissan Pathfinder, Nissan Quest, Nissan 370Z, and select INFINITI applications.

This part cross-references 226A01HC0A and 226A01KC0A for the same application.

What This Oxygen Sensor Helps Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect air-fuel ratio feedback to the engine control unit
• Slow sensor response during closed-loop operation
• Emissions test failures tied to oxygen sensor faults
• Rough combustion control caused by aging sensor elements

Installation Notes and Tips

Confirm the exact position before ordering, since this Bosch 18137 sensor is listed for downstream, downstream left, and downstream right locations depending on vehicle application. Verify connector shape, wire count, thread diameter, and harness length against the original sensor before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads for damage or contamination before threading in the replacement sensor.

For fitment, this part is listed for applications including 2013-2018 Nissan Altima, 2011-2017 Nissan Juke, 2012-2014 Nissan Murano, 2013-2014 Nissan Pathfinder, 2012-2013 Nissan Quest, 2014-2020 Nissan 370Z, and select INFINITI Q50, Q70, QX50, QX60, QX70, QX35, QX50, QX60, and Q40 models in downstream positions.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience and validated aftermarket engineering. The sensor uses advanced ceramic elements and heat-resistant materials to support consistent operation in harsh exhaust environments.