Walker 350-34094 Oxygen Sensor

Walker 350-34094 Oxygen Sensor Overview

Walker Products 350-34094 is a heated oxygen sensor built as a specific-fit OE replacement for select GM vehicles. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper air-fuel control on upstream applications.

Compatible With 1998-2009 Buick, Chevrolet, GMC, Oldsmobile, Pontiac, and Saturn applications listed below, including Buick LaCrosse upstream Bank 1 Sensor 1 and Chevrolet Malibu upstream positions. The Walker Products Aftermarket line focuses on application-specific engine management sensors for direct replacement use.

Key Features

• Heated oxygen sensor design for faster operating response
• Specific-fit construction for the listed vehicle applications
• 4-wire configuration with female radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 9.76 in.; overall length: 13.31 in.
• Built to provide ECU feedback for upstream fuel-control monitoring

Detailed Description

Walker 350-34094 is an upstream oxygen sensor for vehicles that rely on precise exhaust-gas feedback to manage fuel delivery and emissions. As an OE-style replacement, it is matched to the specified fitment position and connector layout so the sensor can report exhaust oxygen content to the engine control unit as intended. This part number is listed for multiple GM platforms, including Buick Allure, Buick LaCrosse, Chevrolet Cobalt, Chevrolet Malibu, Pontiac Grand Prix, and Saturn Ion.

This part cross-references Bosch 15717 and Denso 234-9005 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Higher fuel consumption from inaccurate upstream sensor readings
• Increased exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Verify the exact year, make, model, engine, and emissions package before ordering.
• Confirm the position: this listing includes upstream, upstream front, upstream left, upstream right, and downstream applications by vehicle.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Check for exhaust leaks or related engine-management faults that can affect sensor readings.
• Use the listed threaded mounting and connector style to confirm physical match before installation.

Quality Assurance

Walker Products has supplied engine management components since 1946 and states that its sensors are manufactured under Automotive ISO 9001/TS 16949 quality systems. The 350-34094 is built as a specific application replacement for the listed vehicles and positions.