Bosch 15063 Oxygen Sensor - Downstream

Bosch OE Oxygen Sensor for Volvo Downstream Fitment

Bosch Part Number 15063 is a narrow-band heated oxygen sensor built for specific downstream applications on select Volvo models. It delivers air-fuel-ratio feedback to the ECU for stable closed-loop control, accurate combustion management, and lower emissions.

As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects Bosch’s OE development history in oxygen sensing, including faster light-off behavior, improved lambda accuracy, and reliable operation under heat and vibration.

Key Features

• Specific-fit Bosch oxygen sensor for downstream placement
• Narrow-band heated design for quicker closed-loop response
• 4-wire configuration with rectangular male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included for direct replacement service
• Metal housing and high-temperature-resistant construction
• Part Number 15063 for catalog and service identification

Detailed Description

This Bosch oxygen sensor is engineered for 1997 Volvo 850 downstream, 1998 Volvo C70 downstream late production, 1998 Volvo S70 downstream, and 1998 Volvo V70 downstream applications, including V70 chassis breakpoints noted in the fitment data. It uses a heated narrow-band sensing element to provide the ECU with precise exhaust oxygen feedback, helping maintain proper fuel control during warm-up and normal driving.

Bosch’s Actual OE Oxygen Sensor line is based on decades of original-equipment development. The sensor’s ceramic element, controlled heater strategy, and durable materials are selected to maintain consistent signal quality in demanding thermal and vibration conditions. If you are replacing a worn Volvo downstream O2 sensor, Bosch 15063 is built to match the original service requirements for these vehicles.

This part cross-references 9202721 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Rich or lean fuel trim conditions caused by inaccurate O2 feedback
• Slow sensor response during closed-loop operation
• Emissions test failures tied to oxygen sensor degradation
• Rough combustion control after the original sensor ages or contaminates

Installation Notes and Tips

Verify the downstream sensor location before ordering, since this part is specific to the listed Volvo applications. Confirm the connector style, 4-wire layout, and threaded mounting dimensions against the original sensor before installation.

Inspect the exhaust bung threads and wiring routing during replacement. Use proper oxygen sensor service tools and follow the vehicle service manual for torque and connector handling. For fitment, this part is listed for 1997 Volvo 850, downstream; 1998 Volvo C70, downstream; 1998 Volvo S70, downstream; and 1998 Volvo V70, downstream.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in emission control sensing. The Actual OE Oxygen Sensor line is built to deliver OE-proven signal accuracy and durable service performance for Volvo downstream applications.