Walker 250-25170 Oxygen Sensor - Upstream or Upstream Right

OE Base Wide-Band Oxygen Sensor

Walker OE Base Sensor 250-25170 is a heated wide-band oxygen sensor built for specific vehicle applications and OE-style diagnostic feedback. It is engineered for direct replacement use on select Mazda, Ford, and Tribute applications where accurate air-fuel ratio monitoring is required.

The Walker OE Base Sensor line focuses on application-specific fitment and sensor output that matches the vehicle’s ECU expectations. For drivers searching for a 2011-2015 Mazda CX-9 upstream air-fuel ratio sensor or a 2011-2013 Mazda 6 upstream oxygen sensor replacement, this part number provides a targeted solution.

Key Features

• Walker Products OE Base Sensor line for application-specific replacement
• Heated wide-band oxygen sensor for upstream air-fuel ratio monitoring
• Specific fit design for the listed vehicle positions
• 5-wire sensor with oblong female connector
• 6 terminals, male terminal gender
• M18 x 1.5 thread size and 22 mm wrench size

Detailed Description

Walker 250-25170 is an emission control sensor designed to provide the ECU with the feedback needed for fuel control and emissions management. It is listed for 2011-2015 Mazda CX-9 upstream, 2011-2013 Mazda 6 upstream, 2011 Ford Mustang upstream right to 02/03/2011, and 2010-2011 Mazda Tribute upstream. If you need a Walker 250-25170 oxygen sensor for a Mazda CX-9 upstream or a Mazda 6 upstream air-fuel ratio sensor replacement, this OE Base Sensor is built around those exact 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. This part cross-references no listed aftermarket part numbers in the provided data.

Common Issues It May Address

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

Installation Notes and Tips

Confirm the vehicle application, sensor position, connector shape, and thread size before installation. Inspect the sensor wiring harness and connector for damage, since physical wear can shorten sensor life and affect operation. On newer vehicles, stored ECU fault codes may point to the sensor or related systems, so verify the full diagnostic path before replacement.

Quality Assurance

Walker Products manufactures this OE Base Sensor as an original-equipment-style replacement for the specified applications and supports production with ISO 9001/TS 16949 quality systems.