Walker 350-34410 Oxygen Sensor - Downstream

Walker 350-34410 Oxygen Sensor for Ford and Lincoln

Walker Products 350-34410 is a heated downstream oxygen sensor built as a specific-fit OE replacement for select Ford and Lincoln applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions monitoring on vehicles such as the Ford Fusion, Ford Escape, and Lincoln MKZ.

Key Features

• Heated oxygen sensor for downstream placement
• Specific-fit design for direct application matching
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon connector shape
• Wiring harness length: 25.12 in.
• Overall length: 28.66 in.
• Wire gauge: 20

Walker Products Engine Management Line

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE-style replacements for a wide range of vehicles. Part number 350-34410 follows that approach with application-specific fitment and sensor output intended to match the vehicle’s diagnostic requirements.

Detailed Description

This Walker oxygen sensor is designed for downstream bank 1 sensor 2 service on select Ford and Lincoln models, including 2013-2020 Ford Fusion, 2013-2020 Lincoln MKZ, 2013-2018 Ford C-Max, 2013-2016 Ford Escape, 2013-2016 Ford Ranger, 2014-2015 Ford Transit Connect, and 2019-2020 Ford SSV Plug-In Hybrid. The heated sensor design supports accurate exhaust monitoring after the catalytic converter, helping the ECU track emissions performance and fuel system operation. If you are searching for a downstream oxygen sensor for Ford Fusion B1S2 or a replacement oxygen sensor for Lincoln MKZ downstream bank 1 sensor 2, Walker 350-34410 is built for those specific applications.

This part cross-references no listed aftermarket part numbers in the provided data.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• 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 the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle’s year, make, model, and downstream bank 1 sensor 2 location before ordering. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion during replacement. Because this is a threaded, specific-fit sensor, verify connector shape, thread diameter, and harness length against the original part before installation.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946.