Walker 350-34670 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

OE Replacement Oxygen Sensor for Ford and Lincoln

Walker OE Replacement Oxygen Sensor Part Number 350-34670 is a specific-fit, heated narrow-band sensor built for downstream monitoring on select Ford and Lincoln trucks and SUVs. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions management.

Walker Products has developed this sensor line as an Original Equipment replacement for many vehicles worldwide. For applications such as the Ford F-150, Ford F-250 Super Duty, Ford F-350 Super Duty, Ford Ranger, Expedition, and Lincoln Navigator, the correct downstream sensor position is critical for accurate diagnostic reporting.

Key Features

• Heated narrow-band oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed Ford and Lincoln applications
• 4-wire configuration with rectangular female connector
• M18 x 1.5 threaded mounting for direct replacement use
• 455 mm wiring harness length and 480 mm overall length
• 20-gauge wiring with 4 terminals and spade-style terminals
• 22 mm wrench size for service access

Detailed Description

Walker 350-34670 is an OE Replacement oxygen sensor designed for downstream right, downstream left, and downstream positions depending on vehicle application. It is built to match the specific fitment position and diagnostic feedback requirements used by the ECU, helping maintain proper emissions-system operation on 2019-2025 Ford F-150, Ford Ranger, Ford Expedition, Ford F-250 Super Duty, Ford F-350 Super Duty, and 2024 Lincoln Navigator applications.

This Walker OE Replacement line focuses on application-specific sensor design rather than universal fitment. The heated narrow-band construction, threaded M18 - 1.5 mounting, and female rectangular connector support direct replacement on the listed vehicles. Part number 350-34670 is a practical choice when replacing a downstream oxygen sensor on a Ford F-150 or Ford Super Duty truck where accurate exhaust feedback is required.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures electronic components under ISO 9001/TS 16949 quality systems.

What It Helps Address

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

Installation Notes and Tips

Confirm the exact vehicle, model year, and sensor position before ordering. This part is listed for downstream right, downstream left, and downstream locations only where specified in the fitment data. Inspect the sensor wiring harness and connector for physical damage during replacement, since damaged wiring can shorten sensor life and affect operation.

For service on Ford F-150, Ford Ranger, Ford Expedition, Ford F-250 Super Duty, Ford F-350 Super Duty, and Lincoln Navigator applications, verify the threaded mounting, connector shape, and harness routing against the original sensor before installation.

Quality Assurance

Walker Products manufactures this OE Replacement sensor as an application-specific component for the listed vehicles and backs its engine management sensor programs with long-running OE replacement experience and ISO 9001/TS 16949 certified manufacturing practices.