Walker 250-54042 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor 250-54042

Walker Products OE 250-54042 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Volvo and Jaguar applications. It is built for the correct mounting position and diagnostic feedback expected by the ECU, helping maintain accurate air-fuel monitoring on upstream systems.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• Threaded mounting with 18.0 mm thread diameter
• 4-wire configuration with male connector
• 23.15 in. wiring harness length and 26.69 in. overall length
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products OE sensors are developed as original-equipment replacement parts for many vehicles worldwide, with application-specific fitment and ECU feedback requirements in mind. Part number 250-54042 is used in upstream oxygen sensor locations on select Volvo S40, Volvo V50, Volvo XC60, Volvo XC90, Volvo S60, Volvo S90, Volvo V90, Volvo V90 Cross Country, and Jaguar XK, XKR, XKR-S, XF, XFR, and XJ models. If you are searching for a Volvo XC60 upstream oxygen sensor or a Jaguar XF upstream oxygen sensor, this part number is listed for the specified positions and chassis notes.

Walker Products OE 250-54042 is also a relevant search match for drivers needing an upstream oxygen sensor for Volvo S40 and V50 models, as well as Jaguar XK and XKR applications. The sensor is designed to support the diagnostic system feedback the ECU expects from the affected circuit.

What It Can Help Address

• Check engine light or malfunction indicator light related to oxygen sensor faults
• Poor engine performance caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel control
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the sensor, wiring, or connector

Installation Notes and Tips

Confirm the exact year, model, and upstream position before ordering, especially on Jaguar XF and XFR applications with chassis/VIN break notes. Inspect the sensor wiring harness and connector for physical damage before installation, since damaged wiring can shorten service life and affect operation. Verify the threaded mounting location and connector orientation match the vehicle before final fitment.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The Walker Products OE line focuses on application-specific replacement parts built to match the required fitment position and ECU feedback for the listed vehicles.