Walker 350-35143 Oxygen Sensor - Upstream or Upstream Right

OE Replacement Oxygen Sensor for Select GM Vehicles

Walker Products 350-35143 is an OE-style oxygen sensor engineered for specific upstream applications and ECU feedback requirements. It is built for direct replacement use on select Buick, Cadillac, and Chevrolet models, including the Encore GX, Envista, CT5, Trailblazer, and Trax.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed to match original equipment application needs. The 350-35143 is positioned for the correct vehicle location and diagnostic response, helping restore accurate exhaust monitoring on the listed applications.

Key Features

• OE replacement oxygen sensor for upstream locations
• Application-specific fitment for select Buick, Cadillac, and Chevrolet vehicles
• Supports ECU diagnostic feedback for the affected sensor circuit
• Built for the intended vehicle position, including upstream and upstream right applications
• Walker Products part number 350-35143

Vehicle Fitment

• Fits 2023-2024 Buick Encore GX, upstream.
• Fits 2024 Buick Envista, upstream.
• Fits 2022-2024 Cadillac CT5, upstream right.
• Fits 2023-2024 Chevrolet Trailblazer, upstream.
• Fits 2024 Chevrolet Trax, upstream.
• Fits 2020-2022 Buick Encore GX, upstream.
• Fits 2021-2022 Chevrolet Trailblazer, upstream.

What It Helps Address

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

Installation Notes

Confirm the exact position before installation, since this part is listed for upstream and upstream right applications depending on vehicle. Inspect the sensor, wiring harness, and connector for physical damage before replacement, and verify the fault code matches the affected circuit. For fitment-based searches, this part is commonly selected for a 2023-2024 Buick Encore GX upstream oxygen sensor, a 2022-2024 Cadillac CT5 upstream right oxygen sensor, or a 2023-2024 Chevrolet Trailblazer upstream oxygen sensor.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-35143 is part of the Walker Products Aftermarket line, which is focused on OE replacement sensor applications and correct diagnostic system feedback.