Walker 250-25164 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

OE Base Wide-Band Oxygen Sensor

Walker OE Base Sensor 250-25164 is a specific-fit heated wide-band oxygen sensor built for direct replacement in select Ford, Lincoln, Mercury, Mazda, and Land Rover applications. It is engineered to provide the ECU with the diagnostic feedback needed for accurate air-fuel control, emissions monitoring, and drivability.

Use Walker 250-25164 when servicing upstream oxygen sensor locations on vehicles such as the Ford F-150, Ford Taurus, and Land Rover Range Rover. The OE Base Sensor line focuses on application-specific fitment and connector configuration for straightforward replacement.

Key Features

• Heated wide-band oxygen sensor for precise exhaust feedback
• Specific-fit design for the listed vehicle applications
• 5-wire sensor with oblong connector shape
• Female connector with male terminals
• M18 x 1.5 thread size and 22 mm wrench size
• Designed for upstream and upstream rear positions where listed

Detailed Product Information

Walker Products 250-25164 is an OE-style oxygen sensor intended for vehicles that require a wide-band, heated sensor in the upstream circuit. It is built to match the application, fitment position, and diagnostic feedback requirements of the ECU, helping maintain proper fuel control and emissions system operation. This part number is listed for multiple Ford, Lincoln, Mercury, Mazda, and Land Rover models, including 2016-2021 Land Rover Range Rover, 2016-2020 Land Rover Range Rover Sport, 2011-2012 Ford Mustang, and 2009-2011 Ford F-150 upstream right applications.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures electronic components under ISO 9001/TS 16949 quality systems. Part number 250-25164 is part of the OE Base Sensor line, which is focused on direct replacement fitment for specific vehicles rather than universal coverage.

Common Issues This Sensor May Address

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

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the sensor location, thread size, and connector style against the original part before installation. For fitment, verify the exact application notes for your vehicle, especially on Ford F-150, Ford Taurus, and Land Rover Range Rover models where position and build date matter.

This part cross-references Bosch 17098 and Denso 234-9005 for the same application.

Quality Assurance

Walker Products manufactures engine management sensors for OE-style replacement applications and operates under ISO 9001/TS 16949 certified quality systems. The OE Base Sensor line is built for application-specific fitment and diagnostic performance.