Bosch 15370 Oxygen Sensor - Downstream

Bosch Validated Oxygen Sensor for Downstream Control

Bosch Validated Oxygen Sensor 15370 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for downstream applications on select INFINITI and Nissan models, including 370Z, G37, FX35, FX50, and Versa.

Using Bosch’s OE development experience, this sensor combines a ceramic sensing element, optimized heater control, and high-temperature-resistant materials to support stable closed-loop operation under demanding heat and vibration.

Key Features

• Specific-fit downstream oxygen sensor for select INFINITI and Nissan vehicles
• Narrow-band heated sensor design for accurate lambda feedback
• 4-wire configuration with included wiring harness
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Rectangle connector with male terminals and blade terminal type
• Standard replacement grade for OE-style service work
• Bosch Validated Oxygen Sensor line backed by Bosch OE engineering

Product Details

Bosch part number 15370 is a downstream oxygen sensor designed to monitor exhaust oxygen content and send precise signals to the engine control unit. That feedback helps the ECU maintain stable combustion control and emissions performance across changing operating conditions. This Bosch Validated Oxygen Sensor is a direct-fit style replacement for vehicles such as the 2007-2012 Nissan Versa, 2007-2013 Nissan 350Z and 370Z, and multiple INFINITI applications including G35, G37, FX35, FX50, M35, M37, and Q70.

This part cross-references 226A0ET000 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect air-fuel ratio feedback to the ECU
• Rough or unstable closed-loop fuel control
• Emissions test failures tied to sensor performance
• Slow sensor response from heat-related wear

Installation Notes

Install in the downstream exhaust position only where listed in the fitment data. Verify the 18 mm thread size, 22 mm hex size, 4-wire connector layout, and rectangle plug before installation. Because this is a specific-fit sensor, confirm the vehicle year, make, model, and emission configuration, including notes such as California emissions exclusions and build-date breakpoints for certain Nissan Cube applications.

Compatible With 2014-2019 INFINITI Q70, downstream; 2015-2019 INFINITI Q70L, downstream; 2014 INFINITI Q70, downstream; 2014 INFINITI QX50, downstream; 2014 INFINITI QX70, downstream; 2012-2014 Nissan Cube, downstream; 2013 INFINITI EX37, downstream; 2013 INFINITI FX37, downstream; 2009-2013 INFINITI FX50, downstream; 2008-2013 INFINITI G37, downstream; 2011-2013 INFINITI M37, downstream; 2011-2013 INFINITI M56, downstream; 2009-2013 Nissan 370Z, downstream; 2008-2012 INFINITI EX35, downstream; 2007-2012 INFINITI FX35, downstream; 2011-2012 INFINITI G25, downstream; 2007-2012 Nissan Versa, downstream; 2011 Nissan Cube, downstream; 2007-2010 INFINITI M35, downstream; 2009-2010 Nissan Cube, downstream; 2007-2009 Nissan 350Z, downstream; 2007-2008 INFINITI G35, downstream.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this product line. The Bosch Validated Oxygen Sensor range is built to OE-proven standards for accuracy, durability, and consistent operation in harsh thermal and vibration conditions.