Bosch 15820 Oxygen Sensor - Upstream Right

Bosch OE Oxygen Sensor for Nissan

Bosch 15820 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 for select Nissan applications, including 2003 Frontier upstream right and 2003 Xterra upstream right.

Key Features

• Actual OE Oxygen Sensor from Bosch Actual OE Oxygen Sensor line
• Narrow-band heated O2 sensor with 3-wire configuration
• Specific fit with threaded mounting and 18 mm thread size
• Blade terminals, oblong connector, male connector and terminal ends
• Wiring harness included; harness length 9.7 in
• Metal housing with steel finish for high-temperature service
• Overall length 13.4 in; sealing surface to connector end length 12.2 in
• Hex size 22 mm for service removal

Detailed Description

Bosch part number 15820 is an OE-style replacement oxygen sensor engineered for accurate switching-type signal output in closed-loop fuel control. Bosch developed its oxygen sensor technology over decades of OE production, moving from early thimble designs to planar narrowband construction that improves light-off response, lambda accuracy, and closed-loop transition speed. For Nissan Frontier and Nissan Xterra applications, this sensor provides the direct-fit configuration needed for upstream right placement.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow sensor response during closed-loop operation
• Emissions test failures tied to upstream sensor faults
• Rough combustion control caused by degraded O2 signal output

Installation Notes and Tips

Verify the upstream right location before installation and confirm the 18 mm threaded bung matches the vehicle exhaust port. Use the 22 mm hex size for removal and installation, and inspect the connector shape, terminal count, and harness routing to match the original sensor layout. For 2003 Nissan Frontier and 2003 Nissan Xterra, confirm the specific-fit application and route the harness away from exhaust heat and moving components.

Quality Assurance

Bosch supplies oxygen sensors with OE development experience and materials selected for thermal and vibration resistance. Bosch 15820 is built to OE-proven standards for accurate signal control and durable service in demanding exhaust environments.