Bosch 13371 Oxygen Sensor - Downstream or Upstream

Bosch Oxygen Sensor for Honda and Acura

Bosch 13371 is a narrow-band heated oxygen sensor built for specific downstream and upstream applications on select Honda and Acura vehicles. It provides the ECU with air-fuel-ratio feedback for stable combustion control and emissions monitoring, including Honda Civic, CR-V, and Element coverage.

Key Features

• Bosch Engineered Oxygen Sensor, part number 13371
• Narrow-band heated O2 sensor for precise closed-loop feedback
• Specific fit design with a threaded mounting style
• 4-wire configuration with blade terminals and a rectangular female connector
• Wiring harness included; harness length measures 9.7 in
• Overall length: 13.4 in; sealing surface to connector end: 12.2 in
• 18 mm thread size and 22 mm hex size
• Metal housing with steel finish for underbody service conditions

Product Details

Bosch Engineered Oxygen Sensor 13371 uses a heated narrow-band sensing element to deliver air-fuel-ratio data to the engine control unit. Bosch has decades of OE oxygen sensor development behind this design, including early thimble-style sensors and later planar narrowband technology that improved light-off speed, lambda accuracy, and closed-loop response. This sensor is built with ceramic sensing elements, controlled heating, and high-temperature-resistant materials for consistent operation in demanding exhaust environments. It is a direct-fit replacement for select Honda and Acura applications, including 2003-2011 Honda Element downstream, 2002-2006 Honda CR-V downstream, 2004-2005 Honda Civic downstream with California Emission System, 2003 Honda Civic downstream with California Emission System, and 1999-2000 Honda Civic and Acura EL upstream positions. Part number 13371 is also a useful reference when verifying the correct Bosch Engineered Oxygen Sensor for these applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow closed-loop response after warm-up
• Emissions test failures tied to sensor signal degradation
• Rough combustion control caused by a worn upstream or downstream O2 sensor

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for both upstream and downstream applications depending on vehicle and engine/emissions configuration. Verify the connector shape, wire count, thread size, and harness length against the original sensor on the vehicle. For Honda Civic applications with California Emission System notes, match the chassis and position details exactly. Use proper oxygen sensor service tools and inspect the exhaust bung threads before installation to ensure a clean threaded seal.

Quality Assurance

Bosch supplies this oxygen sensor as an OE-proven replacement backed by more than five decades of oxygen sensor development and aftermarket support. Bosch 13371 is engineered to meet the demands of daily driving, thermal cycling, and vibration in Honda Civic, CR-V, Element, and Acura EL applications.

This part cross-references Honda/Acura OE numbers 36531P2PA01 and 36532PZA306 for the same application.