Bosch 15384 Oxygen Sensor - Downstream, Downstream Front or Downstream Left

Bosch Validated Oxygen Sensor for Nissan and INFINITI

Bosch Validated Oxygen Sensor Part Number 15384 is a narrow-band heated downstream O2 sensor built for specific Nissan and INFINITI applications. It provides precise air-fuel-ratio feedback to the ECU, helping maintain stable combustion control and lower emissions across changing operating conditions.

With OE-developed ceramic sensing elements, optimized heater control, and high-temperature-resistant materials, this Bosch oxygen sensor is built for consistent signal response in demanding exhaust environments. It is a direct-fit replacement for select Nissan GT-R, Altima, Maxima, Murano, Quest, NV2500, NV3500, and INFINITI QX56 and QX80 applications.

Key Features

• Bosch Validated Oxygen Sensor, Part Number 15384
• Narrow-band heated oxygen sensor for downstream placement
• Specific fit design with threaded mounting
• 4-wire configuration with rectangular male connector
• Wiring harness included; harness length 8.6 in.
• 22 mm hex size and 18 mm thread diameter
• Metal housing for durability in high-heat exhaust locations
• Standard replacement grade for OE-style service

OE-Validated Bosch Sensor Line

The Bosch Validated Oxygen Sensor line draws on Bosch OE development dating back to the original oxygen sensor designs introduced in 1976. This product line uses Bosch narrow-band switching technology to deliver accurate lambda feedback, faster closed-loop operation, and dependable heater performance for modern emissions systems. Part Number 15384 continues that OE-focused approach for select Nissan and INFINITI downstream sensor locations.

Detailed Description

Bosch 15384 is engineered for vehicles that rely on a downstream narrow-band oxygen sensor to monitor exhaust efficiency after the catalytic converter. It is a direct replacement for applications such as 2009-2019 Nissan GT-R downstream, 2007-2012 Nissan Altima downstream left or downstream front with California emission system, 2009-2014 Nissan Maxima downstream left, 2009-2011 Nissan Murano downstream left, 2011 Nissan Quest downstream left, 2012-2017 Nissan NV2500 downstream, 2012-2017 Nissan NV3500 downstream, 2011-2013 INFINITI QX56 downstream, and 2014-2015 INFINITI QX80 downstream.

This sensor is also listed for 2020-2021 and 2023-2024 Nissan GT-R downstream applications. If you are replacing a worn downstream O2 sensor on a Nissan GT-R, Nissan Altima, or INFINITI QX80, Bosch 15384 provides the OE-style signal response expected by the engine control system.

This part cross-references Nissan 226A0EN21A for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Slow or inaccurate oxygen sensor signal response
• Emissions test failures tied to exhaust monitoring faults
• Rough combustion control caused by incorrect air-fuel feedback
• Heater circuit issues in heated narrow-band sensor applications

Installation Notes and Tips

Install Bosch 15384 only in the listed downstream positions for the confirmed Nissan and INFINITI applications. Verify connector shape, wire count, thread size, and harness length before installation. Because this is a threaded oxygen sensor, use the correct 22 mm oxygen sensor socket and follow the vehicle service procedure for exhaust sensor removal and torque specification. Inspect the harness routing and connector lock before clearing diagnostic codes.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The sensor uses OE-proven design principles, including heated narrow-band operation and durable materials selected for high-temperature exhaust service.