Walker 350-34043 Oxygen Sensor - Downstream or Upstream

Walker 350-34043 Oxygen Sensor Overview

Walker Products 350-34043 is a heated oxygen sensor built as an OE-style replacement for specific upstream and downstream applications. It is engineered for vehicles that rely on accurate exhaust feedback to help the ECU manage fuel delivery and emissions performance.

Compatible With Chevrolet Metro, Suzuki Swift, Suzuki Esteem, Suzuki Sidekick, Suzuki X-90, Suzuki Tracker, Geo Metro, Geo Tracker, Pontiac Firefly, and Pontiac Sunrunner applications listed below.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific-fit application for direct vehicle matching
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• 19.21 in. wiring harness length and 22.76 in. overall length
• Radiused polygon connector shape for application-specific fitment
• Walker Products Aftermarket part number 350-34043

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as replacement parts for original equipment applications. Part number 350-34043 is built for specific fitment positions and provides the diagnostic feedback the ECU expects from the sensor circuit. This matters on vehicles such as the Chevrolet Metro, Suzuki Swift, and Geo Tracker, where the correct upstream oxygen sensor helps maintain proper closed-loop operation and emissions control.

This part number 350-34043 is listed for both upstream and downstream positions across selected vehicles, including Bank 1 Sensor 1 and Bank 1 Sensor 2 applications where noted. It is a direct-fit oxygen sensor for the exact vehicle/emissions configuration shown in the fitment data, including non-California and California-ESV listings where specified.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

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

Installation Notes and Tips

• Verify the exact year, make, model, position, and emissions configuration before ordering.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before installation.
• Confirm the threaded mounting location and connector style match the original sensor.
• Use the listed upstream or downstream position only as shown in the fitment data.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures this oxygen sensor as an OE-replacement part for specific vehicle applications. The brand operates with Automotive ISO9001/TS 16949 certification and builds parts to support the diagnostic feedback required by the ECU.