Bosch 15955 Oxygen Sensor - Upstream Front, Upstream Left or Upstream Right

Bosch Actual OE Oxygen Sensor 15955

Bosch 15955 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It supports stable combustion control and emissions management in select Infiniti and Nissan applications, including upstream positions on the G20, I30, QX4, Maxima, and Sentra.

Key Features

• Actual OE Oxygen Sensor from Bosch Actual OE Oxygen Sensor line
• Narrow-band heated O2 sensor for closed-loop fuel control
• Specific-fit design with 3-wire harness and oblong male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Wiring harness included; harness length measures 12.6 in
• Fits upstream and upstream front positions on select Infiniti and Nissan models

Product Details

Bosch has decades of OE oxygen sensor development behind this replacement part, and the 15955 follows that engineering approach with a planar narrowband design, optimized heater control, and ceramic sensing elements. The result is fast sensor response, accurate lambda feedback, and consistent operation under heat and vibration. This part cross-references 226905M014 and 226913Y101 for the same application.

Compatible With 2000-2001 Infiniti G20, upstream; 2000-2001 Infiniti I30, upstream front; 2001 Infiniti QX4, upstream right; 2000-2001 Nissan Maxima, upstream left; and 2000-2001 Nissan Sentra, upstream right, depending on emission package and production notes. Bosch 15955 is a direct-fit replacement for drivers servicing upstream oxygen sensor faults on these vehicles.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle or unstable fuel trim from inaccurate exhaust feedback
• Reduced fuel economy caused by delayed closed-loop operation
• Emissions test failures tied to a worn upstream O2 sensor
• Slow sensor response after heat cycling or vibration exposure

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch oxygen sensor uses a threaded mount and a male oblong connector, so confirm the harness routing and upstream location on the vehicle before removal. On applicable Nissan Sentra and Maxima listings, check the emission notes carefully, including California emission, SULEV, and early-production details.

Quality Assurance

Bosch supplies OE-developed oxygen sensor technology to the aftermarket, using materials and heater control strategies proven in original equipment applications. Bosch 15955 is built to deliver consistent signal accuracy and durable service in demanding exhaust environments.