Walker 350-34150 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Walker 350-34150 Oxygen Sensor Overview

Walker Products 350-34150 is a heated, specific-fit oxygen sensor built for downstream applications on select Ford vehicles. It is engineered as an OE-style replacement that delivers the ECU feedback needed for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on application-specific engine management sensors, and this oxygen sensor follows that approach with the correct connector style, wire count, and threaded mounting design for listed Ford fitments.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for listed Ford applications
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon shape
• 18.0 mm thread diameter and threaded mounting type
• Wiring harness length: 19.29 in.; overall length: 21.65 in.

Detailed Description

The Walker 350-34150 oxygen sensor is designed for Ford F-150, F-250 Super Duty, F-350 Super Duty, Transit-150, Transit-250, Transit-350, Transit-350 HD, Mustang, Edge, and Fusion applications where a downstream sensor is specified. It is built to provide the diagnostic feedback the ECU expects, helping maintain accurate air-fuel management and emissions system operation.

This part number is a direct-fit style replacement for listed positions such as downstream left, downstream right, and downstream locations on select 2014-2022 Ford models. If your vehicle has a stored fault code related to the oxygen sensor circuit or downstream emissions monitoring, Walker 350-34150 is the type of replacement used to restore proper sensor input. This part number, 350-34150, is also a practical match for shoppers searching for a Ford F-150 downstream oxygen sensor or a Ford Transit downstream O2 sensor replacement.

What It Can Help Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to sensor signal issues
• Elevated exhaust emissions from a failing O2 sensor
• Diagnostic trouble codes stored in the ECU for sensor-related faults

Installation Notes and Fitment

• Fits 2021-2022 Ford F-350 Super Duty, downstream left.
• Fits 2021 Ford F-250 Super Duty, downstream left.
• Fits 2016-2019 Ford Transit-150, downstream right.
• Fits 2016-2019 Ford Transit-250, downstream right.
• Fits 2016-2019 Ford Transit-350, downstream right.
• Fits 2016-2019 Ford Transit-350 HD, downstream right.
• Fits 2018 Ford F-150, downstream right or downstream left, depending on build date and sensor position.
• Fits 2017 and 2015 Ford F-150, downstream right or downstream left.
• Fits 2015-2017 Ford Mustang, downstream.
• Fits 2016 Ford Edge, downstream.
• Fits 2015-2016 Ford F-150, downstream right or downstream left.
• Fits 2014-2016 Ford Fusion, downstream.
• Fits 2015 Ford Edge, downstream.

Confirm the original sensor position, connector style, and thread size before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect signal quality.

Quality Assurance

Walker Products has produced engine management and oxygen/air-fuel sensors for OE-style replacement use across many vehicle platforms since 1946. The company is ISO 9001/TS 16949 certified, and this part is manufactured for the specified application and fitment position.