Walker 350-341078 Oxygen Sensor - Downstream Left or Downstream Right

Walker Oxygen Sensor for Transit-150, Transit-250, Transit-350

Walker Products 350-341078 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select 2015 Ford Transit vans. It is built for downstream left or downstream right locations and is designed to provide the ECU with the feedback needed for proper emissions monitoring and fuel control.

For 2015 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD applications, this Walker Products Aftermarket sensor is a direct-fit solution for downstream oxygen sensor service. The Walker Products engine management and oxygen sensor line is developed around application-specific fitment, connector style, and sensor position to match the vehicle’s diagnostic requirements.

Key Features

• Part number: 350-341078
• Heated oxygen sensor for downstream placement
• Specific-fit design for select Ford Transit applications
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 14.56 in.
• Overall length: 17.71 in.

Detailed Description

Walker Products 350-341078 is engineered for emissions control service on select 2015 Ford Transit vans, including Transit-150, Transit-250, Transit-350, and Transit-350 HD. This heated oxygen sensor is positioned for downstream left or downstream right use, depending on the vehicle configuration listed in the fitment data. As an OE-style replacement, it is built to match the application-specific sensor position and deliver the diagnostic feedback expected by the ECU.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for precise vehicle applications. The brand line is centered on replacement parts that align with original equipment fitment, connector design, and sensor function, making this part a practical choice when servicing a Ford Transit downstream oxygen sensor fault.

This part cross-references common OE-style replacement needs for the same application; verify the exact position and connector match before installation.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal issues
• Stored ECU fault codes for bank 1 sensor 2 or bank 2 sensor 2 positions

Installation Notes and Tips

• Confirm the vehicle position before ordering: Fits 2015 Ford Transit-150, downstream right; Fits 2015 Ford Transit-150, downstream left; Fits 2015 Ford Transit-250, downstream right; Fits 2015 Ford Transit-250, downstream left; Fits 2015 Ford Transit-350, downstream right; Fits 2015 Ford Transit-350, downstream left; Fits 2015 Ford Transit-350 HD, downstream right; Fits 2015 Ford Transit-350 HD, downstream left.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before replacement.
• Check for exhaust leaks or damaged wiring that could shorten sensor life or trigger repeat fault codes.
• Use the vehicle’s ECU fault codes and sensor location to confirm bank and position before installation.

Quality Assurance

Walker Products manufactures engine management sensors under ISO 9001 / TS 16949 quality systems and develops application-specific parts for vehicle fitment and diagnostic feedback. Since 1946, the brand has supplied oxygen and air-fuel sensors for aftermarket replacement needs.