Walker 350-34446 Oxygen Sensor

OE Replacement Oxygen Sensor for Ford and Lincoln

Walker Products 350-34446 is a heated oxygen sensor built as an OE-style replacement for specific downstream positions on select Ford and Lincoln vehicles. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

For drivers searching for a downstream oxygen sensor for Ford Mustang, F-150, Explorer, Flex, Taurus, Transit, or Lincoln MKZ and MKT applications, this part number 350-34446 is matched to the listed fitments and mounting position.

Key Features

• Heated oxygen sensor design for faster operating response
• Specific-fit application for the listed downstream positions
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• 15.28 in. wiring harness length and 18.82 in. overall length
• Radiused polygon connector shape for vehicle-specific fitment

Walker Products Aftermarket Line

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for direct replacement use. Part number 350-34446 follows that approach with application-specific fitment, connector style, and sensor placement intended to match the vehicle’s original diagnostic requirements.

Detailed Description

Walker Products 350-34446 is designed for downstream oxygen sensor locations on select 2011-2020 Ford and Lincoln models, including Mustang, F-150, Explorer, Flex, Taurus, Transit, MKZ, MKS, and MKT applications. It supports the ECU by reporting exhaust oxygen content after the catalyst, helping the vehicle monitor emissions system performance and fuel mixture control. This part cross-references standard OE-style replacement needs for the same application.

Common search terms for this part include downstream right oxygen sensor for Ford Mustang, downstream left oxygen sensor for Ford F-150, and post-catalyst oxygen sensor for Lincoln MKZ and MKT. The sensor is a threaded, heated, specific-fit unit built for the listed positions only.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing downstream sensor
• Rough engine operation when the ECU receives incorrect sensor data
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Verify the exact year, make, model, and downstream position before installation. Confirm connector shape, wire count, thread diameter, and harness length against the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before replacement, since damaged wiring can shorten sensor life and affect readings.

Fits 2020 Ford Mustang, downstream right. Fits 2011-2019 Ford Mustang, downstream right and downstream left. Fits 2015-2017 Ford F-150, downstream right and downstream left. Fits 2011-2016 Ford F-150, downstream right and downstream left. Fits 2015 Ford Transit, Transit-150, Transit-250, Transit-350, and Transit-350 HD, downstream left. Fits 2015-2016 Lincoln MKZ, downstream rear and downstream front. Fits 2015 Lincoln MKT, downstream rear and downstream front. Fits 2016 Lincoln MKS, downstream rear and downstream front.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and states that its sensors are developed as original-equipment replacement parts for specific vehicle applications. The company is ISO 9001/TS 16949 certified, supporting controlled manufacturing and application-specific fitment for parts like 350-34446.