Walker 350-31019 Oxygen Sensor - Upstream

Walker 350-31019 Oxygen Sensor Overview

Walker 350-31019 is a specific-fit oxygen sensor engineered as an OE-style replacement for select 1990 Dodge Ram 50 and Mitsubishi Mighty Max applications. It is built for the upstream Bank 1 Sensor 1 position on non-California emissions vehicles, helping the ECU receive the feedback it needs for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for direct application fitment. The 350-31019 follows that approach with a threaded, non-heated design and vehicle-specific connector configuration for the listed applications.

Key Features

• Part number: 350-31019
• Specific-fit oxygen sensor for select 1990 applications
• Upstream, Bank 1 Sensor 1 placement
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Female connector with radiused polygon shape
• 15.28 in. wiring harness length
• 20-gauge wire with single-wire construction
• Overall length: 18.82 in.

Detailed Description

Walker Products 350-31019 is designed for 1990 Dodge Ram 50 and 1990 Mitsubishi Mighty Max models listed for non-California emissions configurations. It is an upstream oxygen sensor for Bank 1 Sensor 1, where accurate exhaust feedback is used by the ECU to manage air-fuel ratio and monitor emissions performance. If the original sensor is slow, damaged, or no longer sending reliable data, the engine may run poorly, use more fuel, or trigger a malfunction indicator light.

This Walker Products Aftermarket oxygen sensor uses a threaded mount, a female connector, and a radiused polygon connector shape for the specified fitment. The non-heated design and application-specific harness length support direct replacement on the listed vehicles. Part number 350-31019 is also referenced for the same application as Walker Products 350-31019.

What This Sensor Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rich or lean fuel mixture concerns
• Reduced fuel economy caused by inaccurate exhaust feedback
• Higher exhaust emissions from a failing sensor
• Poor engine operation tied to incorrect ECU sensor input

Installation Notes and Tips

Confirm the vehicle is a 1990 Dodge Ram 50 or 1990 Mitsubishi Mighty Max with non-California emissions before ordering. Verify the upstream Bank 1 Sensor 1 location, connector style, and threaded mounting dimensions against the original part. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before installation, since related damage can shorten sensor life.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and fitment positions. The brand operates with ISO 9001/TS 16949 quality systems and has supplied engine management and fuel system components since 1946.