The oxygen sensor installs in the upstream position on 2020-2024 Buick Encore GX, 2024 Buick Envista, Chevy Trax, 2022-2024 Cadillac CT5 and 2021-2024 Chevy Trailblazer. It measures the exhaust air-fuel ratio across a broad range so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-35143 Oxygen Sensor Features:

• Fits 2020-2024 Buick Encore GX; 2024 Buick Envista, Chevy Trax; 2022-2024 Cadillac CT5; 2021-2024 Chevy Trailblazer
• Engine coverage includes 1.2L I3, 6.2L V8 applications
• Sensor location by application: B1S1 (bank and sensor number)
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 500 mm (19.7 in.) overall length
• Male rectangle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue