Walker 350-34103 Oxygen Sensor - Upstream

Walker 350-34103 Oxygen Sensor for Dodge B150/B250

Walker Products 350-34103 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select 1988-1989 Dodge B150 and Dodge B250 applications. It is built for the upstream position and is designed to deliver the diagnostic feedback the ECU expects from the exhaust stream.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit for direct application matching
• Upstream mounting position
• 4-wire design with female connector
• Threaded installation with 18.0 mm thread diameter
• Wiring harness length: 56.42 in.; overall length: 59.96 in.
• Walker Products Aftermarket line for engine management and oxygen sensor replacement

Product Details

Walker Products 350-34103 is part of the Walker Products Aftermarket engine management line, which focuses on replacement sensors built for defined vehicle applications and ECU feedback requirements. This oxygen sensor is specified for 1988-1989 Dodge B150 and 1988-1989 Dodge B250 upstream locations, making it a direct-match option for owners servicing the exhaust feedback system on these vans. The heated design, 4-wire configuration, and threaded mount support accurate signal delivery once installed in the correct position. Walker Products has supplied engine management and fuel system components since 1946, and its sensor catalog is built around application-specific fitment.

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

What This Oxygen Sensor Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel feedback
• Higher fuel consumption from inaccurate exhaust readings
• Increased exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes and Tips

Install this sensor in the upstream position only for the listed Dodge B150 and Dodge B250 applications. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect signal quality. Confirm the 18.0 mm threaded mounting point and connector style match the vehicle before installation.

Quality Assurance

Walker Products manufactures this sensor as an application-specific replacement for the listed vehicles and positions. The brand’s engine management components are developed around OE-style fitment and ECU feedback requirements for modern diagnostic systems.