Walker 350-34028 Oxygen Sensor - Upstream

Walker Products Oxygen Sensor for Ford Applications

Walker Products 350-34028 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for select Ford vehicles. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 16.26 in.; overall length: 19.8 in.

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed for OE replacement use across many vehicles worldwide. Part number 350-34028 is designed for the correct fitment position and sensor feedback required by the ECU, making it a practical choice for Ford Focus upstream oxygen sensor replacement and Ford Transit Connect upstream oxygen sensor service. It also applies to select Ford EcoSport models listed in the fitment data. This part number, 350-34028, is built around the application-specific sensor layout rather than a universal design.

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

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle position before installation. This sensor is listed for upstream applications on 2008-2011 Ford Focus and 2010-2013 Ford Transit Connect, plus OE replacement use on 2007 Ford Focus and 2009-2015 Ford EcoSport. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement. Verify the threaded mounting point and connector shape match the original part before installation.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34028 oxygen sensor is produced for application-specific fitment and ECU feedback requirements.