Walker 350-31022 Oxygen Sensor - Upstream

Walker 350-31022 Oxygen Sensor for Mazda B2000/B2200

Walker Products 350-31022 is a specific-fit oxygen sensor engineered as an OE-style replacement for select Mazda B2000 and Mazda B2200 applications. It is built for upstream placement and is designed to deliver the ECU feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for confirmed Mazda applications
• Upstream position for Bank 1 Sensor 1 and front sensor locations
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Female radiused polygon connector
• 36.93 in. wiring harness length with 20-gauge wire
• Overall length: 40.47 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for application-specific fitment and ECU feedback requirements. Part number 350-31022 is intended for upstream oxygen sensor service on 1986-1987 Mazda B2000 and 1987-1989 Mazda B2200 models. For search relevance, this is a direct-fit oxygen sensor for Mazda B2000 upstream replacement and Mazda B2200 front oxygen sensor service. The Walker Products 350-31022 oxygen sensor supports the emissions control system by helping the ECU monitor exhaust oxygen content and adjust engine operation accordingly.

This part cross-references no listed interchange numbers in the provided data.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust oxygen readings
• Increased exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the vehicle’s sensor position before ordering: this part is for upstream use only. Inspect the sensor wiring harness and connector for physical damage during diagnosis, since damaged wiring can shorten sensor life and affect readings. Confirm thread size, connector style, and harness length match the original unit before installation on Mazda B2000 or Mazda B2200 applications.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and positions. The brand states its operations are ISO 9001 and TS 16949 certified, with product development focused on fitment accuracy and ECU feedback requirements.