Walker 250-54077 Oxygen Sensor - Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor for Volvo

Walker Products OE Part Number 250-54077 is a heated oxygen sensor built for specific upstream applications on select Volvo models. It is engineered for direct-fit replacement use where accurate ECU feedback, stable fuel control, and emissions monitoring are required.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Volvo applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 28.07 in.; overall length: 31.61 in.

Product Details

Walker Products OE sensors are developed as original-equipment replacement parts for vehicle-specific fitment and diagnostic feedback. Part number 250-54077 is intended for upstream oxygen sensor locations on Volvo XC90 and Volvo S80 applications, including 2005-2011 Volvo XC90 upstream right and upstream left, plus 2008-2010 Volvo S80 upstream right and upstream left. It also covers select 2007 Volvo S80 upstream positions by chassis/VIN break. This Walker Products OE oxygen sensor supports the ECU with the signal needed to manage air-fuel control and emissions system operation.

Walker Products OE focuses on application-specific engine management components, and 250-54077 follows that approach with the correct connector style, harness length, and threaded mounting format for the listed vehicles. If you are replacing a failed upstream oxygen sensor on a Volvo XC90 or Volvo S80, this part number is matched to the specified position and fitment details.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate sensor readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

• Verify the exact position before ordering: upstream right or upstream left.
• Check the sensor, wiring harness, and connector for physical damage before installation.
• Confirm the VIN break on 2007 Volvo S80 applications before selecting the part.
• Match the connector shape and threaded mounting style to the original sensor.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. Part number 250-54077 is built as an OE-style replacement for the listed Volvo fitments, including Volvo XC90 and Volvo S80 upstream oxygen sensor applications.