Walker 350-33060 Oxygen Sensor - Upstream

Walker 350-33060 Oxygen Sensor Overview

Walker Products 350-33060 is a heated, specific-fit oxygen sensor for upstream applications on select Ford and Mercury vehicles. It is engineered as an OE-style replacement to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Compatible With 1987-1992 Ford and Mercury applications, including Ford E-350 Econoline, Ford F-250, Ford Ranger, and Mercury Topaz, this upstream oxygen sensor is built around the application-specific fitment and connector details listed below.

Key Features

• Heated oxygen sensor for upstream placement
• Specific-fit design for direct application matching
• 3-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper harness connection
• 16.46 in. wiring harness length and 20.0 in. overall length
• Walker Products Aftermarket part number 350-33060

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for replacement use across a wide range of vehicles. Part number 350-33060 is manufactured for the specified application and sensor position so the ECU receives the expected signal from the upstream exhaust stream. On affected vehicles, a failing oxygen sensor can contribute to rough running, higher fuel consumption, increased exhaust emissions, or a malfunction indicator light.

This sensor is listed for upstream use on 1987-1992 Ford Tempo, 1987-1991 Mercury Topaz, 1987-1990 Ford Taurus, 1987-1989 Ford Bronco, 1987-1989 Ford F-150, 1987-1989 Ford F-250, 1987-1989 Ford F-350, 1988-1989 Ford E-350 Econoline, 1988-1989 Ford E-350 Econoline Club Wagon, 1989 Ford Bronco II, 1989 Ford E-250 Econoline, 1989 Ford Ranger, 1990-1992 Ford E-350 Econoline, 1990-1992 Ford E-350 Econoline Club Wagon, 1990-1992 Ford F-250, 1990-1992 Ford F-350, 1990-1992 Ford Ranger, and 1990-1991 Ford E-250 Econoline Club Wagon.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Rich or lean fuel mixture concerns
• Poor engine performance caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect ECU fueling corrections
• Elevated exhaust emissions from a degraded sensor signal

Installation Notes and Tips

Confirm the vehicle year, make, model, and sensor position before ordering. For best results, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before installation. Because this is a threaded, specific-fit sensor, verify thread diameter and lead length against the original part and route the harness to avoid contact with hot exhaust components.

Fits 1990-1992 Ford E-350 Econoline, upstream; fits 1990-1992 Ford E-350 Econoline Club Wagon, upstream; fits 1990-1992 Ford F-250, upstream; fits 1990-1992 Ford F-350, upstream; fits 1990-1992 Ford Ranger, upstream; fits 1990-1991 Ford E-250 Econoline Club Wagon, upstream; fits 1987-1991 Ford Tempo, upstream; fits 1987-1991 Mercury Topaz, upstream; fits 1990 Ford Bronco II, upstream; fits 1990 Ford F-150, upstream; fits 1987-1990 Ford Taurus, upstream; fits 1987-1989 Ford Bronco, upstream; fits 1989 Ford E-250 Econoline, upstream; fits 1988-1989 Ford E-250 Econoline Club Wagon, upstream; fits 1987-1989 Ford E-350 Econoline, upstream; fits 1988-1989 Ford E-350 Econoline, upstream; fits 1988-1989 Ford E-350 Econoline Club Wagon, upstream; fits 1987-1989 Ford F-150, upstream; fits 1987-1989 Ford F-250, upstream; fits 1987-1989 Ford F-350, upstream; fits 1989 Ford Ranger, upstream; fits 1988 Ford E-250 Econoline, upstream.

Quality Assurance

Walker Products has produced engine management and oxygen sensor components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. Part number 350-33060 is built to match the specified application and provide the ECU feedback required for proper system operation.