Walker 350-341059 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Walker Oxygen Sensor for Ford E-350 Super Duty and Mustang

Walker Products 350-341059 is a heated oxygen sensor built as a specific-fit OE replacement for select Ford applications. It is engineered to deliver the ECU feedback needed for proper fuel control and emissions monitoring on downstream positions.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed Ford applications
• 4-wire configuration with a female radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 24.40; overall length: 27.55
• Wire gauge: 20

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for direct replacement use. Part number 350-341059 is designed for the correct application and sensor location, helping the vehicle’s ECU receive the feedback it expects from the downstream exhaust stream. This matters on Ford E-350 Super Duty and Ford Mustang models where bank and sensor position are critical to proper diagnostics and emissions performance.

Fits 2016-2019 Ford E-350 Super Duty, downstream left. Fits 2017 Ford E-350 Super Duty, downstream right and downstream left. Fits 2015-2017 Ford Mustang, downstream right and downstream left. This part cross-references standard OE-style oxygen sensor applications for the same vehicle positions.

What It Helps Address

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

Installation Notes and Tips

Confirm the exact bank and sensor position before ordering, since this part is listed for downstream left and downstream right locations depending on the vehicle and build date. Inspect the sensor connector, wiring harness, and surrounding exhaust components for heat damage, corrosion, or physical wear before installation. Threaded mounting and the specified connector style should be matched to the original sensor location for proper fitment.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts for specific applications and positions. The brand’s ISO 9001 and TS 16949 certified manufacturing background supports consistent application-specific production for modern diagnostic systems.