Walker 250-25122 Oxygen Sensor

OE Oxygen Sensor for Ford and Lincoln

Walker Products OE 250-25122 is a heated, specific-fit oxygen sensor engineered as an OE replacement for select Ford and Lincoln applications. It is built for the correct mounting position and ECU feedback requirements, helping maintain accurate air-fuel monitoring on vehicles such as the Ford Explorer, Ford Edge, and Lincoln MKX.

Walker Products OE focuses on application-specific engine management sensors, with this part number matched to the vehicle position, connector style, and threaded mounting design required for proper service replacement.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 5-wire configuration with 20-gauge wiring
• Radiused polygon female connector for OE-style connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 11.81 in.; wiring harness length: 8.66 in.
• Walker Products OE part number 250-25122

Detailed Description

Walker Products OE 250-25122 is an oxygen sensor designed for upstream positions on select Ford and Lincoln vehicles, including upstream front, upstream rear, upstream left, and upstream right applications depending on the vehicle. Confirmed fitment includes the 2015-2018 Ford Edge, 2016-2019 Ford Explorer, 2016-2019 Ford Flex, 2016-2019 Ford Taurus, 2016-2018 Lincoln MKX, and 2017-2020 Lincoln Continental. This part number also fits select Ford E-350 Super Duty, Transit, Transit-150, Transit-250, Transit-350, Transit-350 HD, Mustang, and Lincoln MKT/MKS applications. If you are replacing a Ford Explorer oxygen sensor or a Lincoln MKX upstream sensor, this OE-style replacement is built for the specified bank and sensor location.

Walker Products has developed its engine management and oxygen/air-fuel sensor line as OE replacement coverage for worldwide vehicle applications. Part number 250-25122 is manufactured for the specified fitment position so the ECU receives the correct diagnostic feedback from the sensor circuit.

What It Helps Address

• Check engine light or MIL illumination related to oxygen sensor faults
• Poor engine performance caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Verify the exact year, make, model, bank, sensor number, and position before ordering.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Confirm the threaded mounting location and connector shape match the original sensor.
• Use the vehicle’s service information for torque and routing specifications.
• For fitment reference, this part fits 2016-2019 Ford Explorer, upstream front or upstream rear depending on engine position.

Quality Assurance

Walker Products OE sensors are backed by the company’s long-running focus on engine management and fuel system components, with ISO 9001/TS 16949 certified manufacturing practices. Part number 250-25122 is built as an OE-style replacement for the specified application and position.