Bosch 16581 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor for OE Fitment

Bosch Validated Oxygen Sensor 16581 is a heated upstream oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for select Honda and Acura applications, including Honda Accord, Honda Civic, Honda CR-V, and Acura Integra.

Key Features

• Specific-fit oxygen sensor with threaded mounting
• Heated design for faster closed-loop operation
• Square connector with male connector and terminal ends
• 5-wire harness with included wiring harness
• Standard replacement grade for OE-style service
• Metal housing with high-temperature-resistant construction
• 18 mm thread diameter and 22 mm hex size

Product Details

Bosch Validated Oxygen Sensor 16581 uses Bosch switching-type sensor technology to deliver accurate exhaust oxygen readings to the engine control unit. Bosch’s oxygen sensor development includes early thimble-style designs and later planar narrowband sensor architecture, which helped improve light-off response, lambda accuracy, and closed-loop control. This upstream sensor is engineered for direct replacement service on select 2023-2025 Acura Integra, 2023-2025 Honda Accord, 2022-2025 Honda Civic, and 2023-2025 Honda CR-V applications, with additional coverage for 2021-2022 Honda Accord and 2018-2020 Honda Accord.

This part cross-references 365316A0A01 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle or unstable air-fuel mixture control
• Delayed closed-loop fuel control after startup
• Elevated emissions from inaccurate exhaust feedback
• Fuel trim issues caused by a worn sensor element

Installation Notes and Tips

Install this sensor in the upstream position only where listed in the fitment data. Confirm the 18 mm thread size, threaded mounting style, and square connector before installation. Because this is a heated sensor with an included harness, route the wiring away from exhaust heat and moving components, and verify connector indexing before final tightening.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development and supplies aftermarket sensors built to OE-proven standards. Bosch Validated Oxygen Sensor 16581 is backed by Bosch’s long history of original equipment engineering and validated replacement coverage for select Honda and Acura vehicles.