Bosch 13539 Oxygen Sensor - Upstream

Bosch Oxygen Sensor for Honda and Acura

Bosch Engineered Oxygen Sensor 13539 is a narrow-band heated upstream O2 sensor built for specific Honda, Acura, and Isuzu applications. It provides precise air-fuel-ratio feedback to the ECU for stable combustion control and lower emissions across changing operating conditions.

With a threaded metal housing, 4-wire layout, and integrated wiring harness, this Bosch oxygen sensor is a direct-fit replacement for select Acura Integra, Honda Civic, Honda Accord, Honda Prelude, Honda Odyssey, Honda CR-V, Acura CL, and Isuzu Oasis applications. Bosch 13539 is engineered for OE-style signal accuracy and consistent closed-loop operation.

Key Features

• Specific-fit Bosch oxygen sensor for select upstream applications
• Narrow-band heated design for faster light-off and quicker closed-loop response
• 4-wire configuration with blade terminals and male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Wiring harness included for direct replacement use
• Overall length: 13.4 in; sealing surface to connector end: 12.2 in

Product Details

Bosch Engineered Oxygen Sensor 13539 uses advanced ceramic sensing elements and optimized heater control to deliver stable narrow-band oxygen sensor readings under heat and vibration. Bosch has decades of OE oxygen sensor development behind this design, and the brand line reflects that OE-focused engineering approach for aftermarket replacement. This part cross-references Honda/Acura OE numbers such as 36531P2T003 and 36531P3FA01 for the same application.

Use Bosch 13539 when replacing an upstream oxygen sensor on vehicles such as the 1994-2001 Acura Integra, 1994-1997 Honda Accord, 1999-2000 Honda Civic, or 1997-2001 Honda CR-V. It is also listed for select Honda Prelude, Odyssey, Civic del Sol, Acura CL, and Isuzu Oasis applications.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle or unstable air-fuel control from an aging O2 sensor
• Delayed closed-loop operation after cold start
• Inaccurate exhaust oxygen feedback affecting fuel trim control
• Emissions test failures tied to sensor response or signal degradation

Installation Notes

Install in the upstream sensor location only where listed in the fitment data. Verify the 18 mm thread size, 4-wire connector style, and harness length before installation. Because this is a specific-fit sensor, compare the connector shape, terminal count, and overall length to the original part before replacement. Use proper oxygen sensor service tools to avoid damaging the threaded mounting area.

Quality Assurance

Bosch supplies this oxygen sensor as a standard replacement part backed by more than five decades of OE development in oxygen sensing technology. The design uses durable materials intended to maintain accurate signal output in demanding thermal and vibration conditions.

• Fits 1994-2001 Acura Integra, upstream
• Fits 1997-2001 Honda CR-V, upstream
• Fits 1999-2000 Honda Civic, upstream
• Fits 1992 Honda Civic, upstream
• Fits 1997-1999 Acura CL, upstream
• Fits 1996-1999 Isuzu Oasis, upstream
• Fits 1995-1998 Honda Odyssey, upstream
• Fits 1994-1997 Honda Accord, upstream
• Fits 1994-1997 Honda Civic del Sol, upstream
• Fits 1992-1996 Honda Prelude, upstream
• Fits 1993-1995 Honda Civic, upstream, without California Emission System