Walker 350-31029 Oxygen Sensor - Upstream

Walker 350-31029 Oxygen Sensor for Select Mitsubishi and Dodge Applications

Walker Products 350-31029 is a specific-fit oxygen sensor built for upstream applications on select Chrysler, Dodge, Hyundai, and Mitsubishi vehicles. It is a non-heated, threaded sensor with a female radiused-polygon connector, made to deliver the ECU feedback needed for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on OE-style replacement sensors for exact vehicle applications, and this part number is matched to the required mounting position and connector style for the listed vehicles.

Key Features

• Part number: 350-31029
• Specific-fit upstream oxygen sensor
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Female connector with radiused polygon shape
• 17.44 in. wiring harness length
• 20-gauge wire with 1-wire configuration
• Overall length: 20.98 in.

Detailed Description

This Walker oxygen sensor is engineered for upstream Bank 1 Sensor 1 locations where the engine management system relies on accurate exhaust feedback to adjust air-fuel delivery. It is a direct-fit replacement for select 1983-1993 Mitsubishi Galant, 1984-1989 Dodge Ram 50, 1987-1989 Dodge Raider, and other listed Chrysler, Dodge, Hyundai, and Mitsubishi models. The 350-31029 is built for vehicles that require a non-heated, threaded sensor with the specified connector and harness layout.

Walker Products Aftermarket has supplied engine management and oxygen/air-fuel sensors since 1946, with manufacturing aligned to application-specific fitment and ECU feedback requirements. This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rich or lean fuel mixture concerns
• Increased fuel consumption from inaccurate exhaust feedback
• Higher exhaust emissions caused by sensor degradation
• Poor engine operation tied to faulty sensor input

Installation Notes and Tips

Confirm the vehicle is listed by year, make, model, and upstream position before ordering. Verify the connector shape, wire count, and thread diameter against the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation, since damaged wiring can shorten sensor life and affect ECU readings.

Fits 1983-1989 Mitsubishi Montero, upstream; fits 1984-1989 Dodge Ram 50, upstream; fits 1987-1989 Dodge Raider, upstream; fits 1988-1989 Hyundai Excel, upstream; fits 1989-1992 Mitsubishi Galant, upstream; fits 1993 Mitsubishi Galant, upstream.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company. The 350-31029 is manufactured as an application-specific replacement sensor for the listed vehicles and positions, with fitment and connector details matched to the original equipment requirements.