Walker 350-34399 Oxygen Sensor

Walker 350-34399 Oxygen Sensor Overview

Walker Products 350-34399 is a heated oxygen sensor built as an OE-style replacement for specific Ford, Lincoln, Mercury, Mazda, and Jaguar applications. It is engineered for the correct fitment position and ECU feedback, helping restore accurate exhaust monitoring on vehicles such as the Ford F-150, Ford Mustang, and Ford Expedition.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors with application-specific design. The 350-34399 follows that approach with a threaded, specific-fit sensor configuration for upstream positions where precise signal response matters.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for application-matched installation
• 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: 8.58
• Overall length: 12.13

Detailed Description

The Walker 350-34399 oxygen sensor is designed for upstream locations where the ECU depends on accurate exhaust-gas feedback to manage fuel delivery and emissions control. It is listed across a broad range of Ford F-150, Ford Mustang, Ford Expedition, Ford Escape, Lincoln Navigator, and Mercury Mariner applications, along with select Mazda Tribute, Jaguar S-Type, and other Ford/Lincoln/Mercury models. For shoppers searching for a Ford F-150 upstream oxygen sensor, Ford Mustang Bank 2 Sensor 1 replacement, or a specific-fit heated O2 sensor for an OE-style repair, this part number provides a direct-match option for the listed positions.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Higher exhaust emissions from delayed or faulty sensor input
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the exact year, make, model, and sensor position before ordering. This part is listed for upstream right, upstream left, upstream front, upstream rear, and upstream applications depending on vehicle configuration. Inspect the sensor connector, wiring harness, and surrounding exhaust components for heat damage or corrosion before installation. Use the vehicle’s service information to verify bank and sensor location, especially on Ford F-150, Ford Mustang, and Ford Expedition applications.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946, with application-specific cataloging and fitment support for aftermarket repair.