Walker 350-34599 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Walker 350-34599 Oxygen Sensor Overview

Walker Products 350-34599 is a heated oxygen sensor built as a specific-fit OE-style replacement for downstream applications. It is engineered for vehicles that rely on accurate exhaust feedback to help the ECU manage fuel delivery and emissions performance.

Compatible With Ford F-250 Super Duty, Ford F-350, Ford F-350 Super Duty, Ford Expedition, and Lincoln Navigator applications in the 2011-2016 range, this sensor is positioned for downstream left or downstream right locations depending on the vehicle. The Walker Products Aftermarket line focuses on application-specific engine management sensors, and this part number follows that approach for direct-fit service work.

Key Features

• Part number: 350-34599
• Heated oxygen sensor design for faster operating response
• Specific fit for the listed downstream positions
• 4-wire configuration with female connector
• Threaded mounting design with 18.0 mm thread diameter
• 13.31 in. wiring harness length and 16.85 in. overall length
• Radiused polygon connector shape
• 20-gauge wire construction

Detailed Product Description

Walker Products 350-34599 is intended for downstream oxygen sensor service where the ECU depends on stable exhaust-gas feedback after the catalytic converter. As a heated sensor, it is designed to reach operating temperature quickly and maintain consistent signal output during normal driving. This helps support proper fuel control, emissions monitoring, and fault-code diagnosis on modern Ford and Lincoln platforms.

Walker Products Aftermarket develops engine management and oxygen/air-fuel sensors as OE replacement parts for specific vehicle applications. For this sensor, the fitment is tied to the exact mounting position and connector style, which is important when servicing a Ford F-250 Super Duty downstream right or left sensor, a Ford F-350 downstream sensor, or a Lincoln Navigator downstream sensor. The 350-34599 part number should be matched to the vehicle’s bank and sensor location before installation.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Fitment Tips

• Fits 2015-2016 Ford F-250 Super Duty, downstream right.
• Fits 2015-2016 Ford F-250 Super Duty, downstream left.
• Fits 2011-2016 Ford F-350, downstream right.
• Fits 2011-2016 Ford F-350, downstream left.
• Fits 2015-2016 Ford F-350 Super Duty, downstream right.
• Fits 2015-2016 Ford F-350 Super Duty, downstream left.
• Fits 2013-2014 Ford Expedition, downstream right.
• Fits 2013-2014 Ford Expedition, downstream left.
• Fits 2012-2014 Ford F-250 Super Duty, downstream right.
• Fits 2012-2014 Ford F-250 Super Duty, downstream left.
• Fits 2012-2014 Ford F-350 Super Duty, downstream right.
• Fits 2012-2014 Ford F-350 Super Duty, downstream left.
• Fits 2012-2014 Lincoln Navigator, downstream right.
• Fits 2012-2014 Lincoln Navigator, downstream left.
• Fits 2012 Ford Expedition, downstream right.
• Fits 2012 Ford Expedition, downstream left.

Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion. Confirm the downstream bank and sensor position on the vehicle, since the 350-34599 is application-specific and must match the correct location. If the original sensor has failed, related wiring or connector damage should also be corrected to avoid repeat faults.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates under Automotive ISO9001/TS 16949 certification. The 350-34599 reflects that application-specific approach for Ford and Lincoln downstream oxygen sensor service.