Bosch 15948 Oxygen Sensor - Downstream

Bosch Oxygen Sensor for Honda and Acura

Bosch Engineered Oxygen Sensor 15948 is a specific-fit, narrow-band heated O2 sensor built for downstream applications on select Honda Civic and Acura RSX models. It provides air-fuel-ratio feedback to the ECU for stable combustion control and emissions monitoring.

Built with Bosch’s OE development experience, this Bosch Engineered Oxygen Sensor line uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials for consistent signal performance under heat and vibration.

Key Features

• Specific-fit downstream oxygen sensor
• Narrow-band heated design for faster closed-loop operation
• 4-wire configuration with rectangular female connector
• Threaded mounting with 18 mm thread diameter
• 22 mm hex size for service access
• Wiring harness included
• Standard replacement grade

Detailed Description

Bosch part number 15948 is engineered for precise oxygen sensing in the exhaust stream, helping the ECU maintain the correct air-fuel ratio during normal driving and emissions control. This Bosch Engineered Oxygen Sensor is a direct-fit replacement for downstream locations on 2002-2006 Acura RSX and 2002-2005 Honda Civic applications listed below. If you are searching for a downstream oxygen sensor for Honda Civic or Acura RSX, Bosch 15948 provides an OE-style service solution backed by Bosch’s long history in oxygen sensor development.

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 downstream sensor faults
• Rough combustion control caused by aging sensor elements

Installation Notes and Tips

Install Bosch 15948 in the threaded downstream exhaust location specified for the vehicle. Verify connector shape, wire count, and thread size before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads for damage or contamination before tightening the sensor.

• Fits 2002-2006 Acura RSX, downstream
• Fits 2002-2005 Honda Civic, downstream

Quality Assurance

Bosch supplies oxygen sensors using OE-driven engineering, including ceramic sensing elements, controlled heater operation, and durable high-temperature materials. Bosch 15948 is part of the Bosch Engineered Oxygen Sensor line developed from decades of original equipment sensor experience.