Bosch 15479 Oxygen Sensor - Downstream or Downstream Rear

Bosch Oxygen Sensor for OE-Style Emissions Control

Bosch Engineered Oxygen Sensor 15479 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing engine loads, making it a direct replacement choice for select Honda and Acura applications.

The Bosch Engineered Oxygen Sensor line draws on Bosch OE development history, including early thimble-sensor designs and later planar narrowband technology. This sensor uses a ceramic sensing element, optimized heater control, and high-temperature-resistant materials to deliver consistent signal response in demanding thermal and vibration conditions.

Key Features

• Part number 15479 Bosch oxygen sensor
• Narrow-band heated oxygen sensor for closed-loop fuel control
• Specific-fit design with 4-wire harness and rectangular female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included; harness length measures 21.5 in
• Metal housing with steel finish for standard replacement use
• OE-proven Bosch Engineered Oxygen Sensor construction

Detailed Description

Bosch 15479 is a switching-type oxygen sensor that reports exhaust oxygen content to the engine control unit so the system can maintain the correct air-fuel ratio. That feedback is critical for smooth idle, throttle response, catalyst efficiency, and emissions control. This Bosch Engineered Oxygen Sensor is a specific-fit replacement for select 1995-2005 Honda and Acura vehicles, including Honda Civic, Honda S2000, Honda Prelude, and Acura NSX applications.

Fits 2004-2005 Honda Civic, downstream. Fits 2000-2003 Honda S2000, downstream. Fits 1997-2000 Honda Prelude, upstream. Fits 1995-1999 Acura NSX, downstream rear. This part cross-references Honda 36532PCXA01 and 36532PMMA01 for the same application.

What This Sensor Helps Address

• Check engine light caused by oxygen sensor signal faults
• Rich or lean fuel mixture readings at the ECU
• Slow closed-loop response after startup
• Emissions test failures related to sensor performance
• Rough idle or inconsistent fuel control from a worn O2 sensor

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is used in downstream, upstream, and downstream rear locations depending on the vehicle. Verify the 18 mm thread size, 4-wire connector style, and harness routing before installation. Because this is a threaded oxygen sensor, use the correct oxygen sensor socket or wrench and inspect the exhaust bung threads for damage before tightening.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The sensor is built with durable materials and heater control strategies intended to maintain accurate operation under high heat and vibration, matching the expectations of OE-style emissions service.