Walker 250-54028 Oxygen Sensor - Upstream

OE Oxygen Sensor for Volvo Upstream Applications

Walker Products OE Oxygen Sensor Part Number 250-54028 is a direct-fit, heated sensor built for specific upstream applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on select Volvo V70 and Volvo S60 models.

Walker Products OE focuses on application-specific engine management sensors, with fitment matched to the vehicle position and connector style. For 2003-2007 Volvo V70 upstream service and 2003-2005 Volvo S60 upstream service, this oxygen sensor is built around the original equipment replacement approach used across the Walker Products OE line.

Key Features

• Part number 250-54028
• Heated oxygen sensor for upstream placement
• Specific fit design for the listed Volvo applications
• 4-wire configuration with 20-gauge wiring
• Male connector with radiused polygon shape
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 16.26 in.
• Overall length: 19.8 in.

Detailed Description

This Walker Products OE oxygen sensor is designed for vehicles that rely on precise exhaust feedback to manage air-fuel ratio and emissions performance. It is a heated, threaded sensor with a specific fit profile, making it suitable for upstream installation where the ECU depends on fast and stable signal input. Part number 250-54028 is listed for 2003-2007 Volvo V70 upstream and 2003-2005 Volvo S60 upstream applications.

Walker Products has built its engine management sensor line around OE-style replacement requirements, with application-specific fitment and connector design. If your Volvo V70 or Volvo S60 is showing sensor-related fault codes, poor fuel economy, elevated emissions, or a malfunction indicator light, the oxygen sensor circuit should be inspected along with the wiring harness and connector for damage.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rich or lean fuel mixture concerns
• Reduced fuel economy
• Higher exhaust emissions
• Poor engine operation caused by inaccurate exhaust feedback

Installation Notes and Tips

Install this sensor in the upstream position only for the listed Volvo applications. Confirm connector shape, wire count, thread diameter, and harness length before installation. Inspect the sensor wiring, connector, and surrounding exhaust components for heat damage, corrosion, or physical wear before replacing the part. Proper thread engagement and secure routing help protect the harness after installation.

Quality Assurance

Walker Products OE is part of an ISO 9001 / TS 16949 certified manufacturing environment and has supplied engine management and fuel system components since 1946. The 250-54028 oxygen sensor is built as an OE-style replacement for the specified Volvo fitments, with application-specific feedback requirements for the ECU.