Walker 250-25168 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

OE Base Wide-Band Oxygen Sensor

Walker 250-25168 is a specific-fit, heated wide-band oxygen sensor built for OE-style replacement on select Porsche, Ford, Lincoln, Volkswagen, and Audi applications. It is engineered to provide the ECU with the feedback needed for accurate air-fuel control, emissions monitoring, and drivability.

The Walker OE Base Sensor line focuses on application-specific fitment and sensor position, making it a practical choice for upstream sensor replacement on vehicles such as the Ford F-150, Ford Expedition, Lincoln Navigator, Volkswagen GTI, and Audi A3.

Key Features

• Heated wide-band oxygen sensor for precise exhaust feedback
• Specific-fit design for the listed vehicle applications
• 5-wire sensor layout with 6 terminals
• Female connector with oblong shape
• Spade terminal type and male terminal gender
• M18 x 1.5 thread size with 22 mm wrench size
• OE Base Sensor line for application-matched replacement

Detailed Description

Walker Products 250-25168 is an emission control oxygen sensor designed for upstream locations where the ECU relies on fast, accurate air-fuel ratio feedback. As a heated wide-band sensor, it supports closed-loop fuel control and helps maintain proper engine management on the listed Porsche 911, Ford F-150, Ford Expedition, Lincoln Navigator, Volkswagen CC, Volkswagen Eos, Volkswagen GTI, Volkswagen Beetle, Volkswagen Jetta, and Audi A3 applications. This part number, 250-25168, is built as a direct replacement for the specified positions and notes shown in the fitment data.

Walker’s OE Base Sensor line is built around application-specific coverage rather than universal fitment, which helps ensure the correct connector style, thread size, and sensor configuration for the vehicle. This part cross-references no listed aftermarket part numbers in the provided data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by inaccurate exhaust feedback
• Increased fuel consumption from poor air-fuel control
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes and Tips

• Verify the exact position before ordering: upstream right, upstream left, or upstream.
• Confirm connector shape, wire count, and terminal style against the original sensor.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation.
• Check for exhaust leaks or engine issues that could affect sensor readings after replacement.
• Use the correct 22 mm wrench size and M18 x 1.5 thread specification during service.

Quality Assurance

Walker Products manufactures engine management and oxygen/air-fuel sensors as OE replacement parts for global vehicle applications. The company is ISO 9001 and TS 16949 certified, and its sensor catalog is built around application-specific coverage for accurate fitment and ECU feedback.