Bosch 15268 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for Honda

Bosch Validated Oxygen Sensor 15268 is a heated wideband air-fuel ratio sensor built for precise upstream fuel control. It delivers continuous measurement across the full lambda range, helping the ECU manage mixture accuracy in Honda Civic, Honda Accord, and Honda HR-V applications.

The Bosch Validated Oxygen Sensor line focuses on OE-style replacement fitment and dependable signal quality. Part number 15268 uses a specific-fit design with a 4-wire, threaded configuration, making it a direct replacement for the listed upstream positions.

Key Features

• Wideband A/F oxygen sensor for accurate air-fuel ratio feedback
• Heated design for faster sensor warm-up and stable operation
• Specific fit with 4-wire construction and rectangular female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included for the listed application
• Steel finish with metal housing for durable underhood use
• Overall length: 11.8 in; sealing surface to connector end: 10.6 in

Detailed Description

Bosch 15268 is a Bosch Validated Oxygen Sensor engineered as a wideband upstream sensor for precise fuel-trim control. Bosch pioneered the wideband A/F oxygen sensor design, and this replacement follows that OE development approach with fast light-off, optimized heater control, and robust ceramic construction. It is a direct-fit option for 2006-2015 Honda Civic upstream, 2014-2015 Honda Accord upstream, and 2016-2022 Honda HR-V upstream applications. This part cross-references Honda OE numbers 36531R1AA01 and 36531RNAA01 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or drivability issues tied to fuel mixture control
• Reduced fuel economy caused by inaccurate sensor feedback
• Higher emissions from delayed or unstable sensor response

Installation Notes and Tips

• Install in the upstream position only for the listed Honda applications.
• Verify the 18 mm thread size and 4-wire connector before installation.
• Inspect the harness routing and connector condition before plugging in the sensor.
• Use proper oxygen sensor service tools to avoid damaging the hex or threads.
• Clear diagnostic trouble codes after installation and confirm closed-loop operation.

Quality Assurance

Bosch draws on more than five decades of OE sensor development, and the Validated Oxygen Sensor line is built to OE-proven standards for accuracy and durability. Part number 15268 is a standard replacement sensor for the listed Honda Civic, Accord, and HR-V fitments.