This 4-wire narrow-band oxygen sensor fits select 2016-2024 Buick, Cadillac, Chevy and GMC applications and signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start. It uses a male/female oblong connector with 4 terminals.

Walker Products 350-341064 Oxygen Sensor Features:

• Fits 2018-2024 Buick Enclave; 2016-2017 Cadillac ATS, CTS, Chevy Camaro; 2016-2018 Cadillac CT6; 2017-2024 Cadillac XT5
• Fits 2020-2024 Cadillac XT6, Chevy Express 2500, Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 1500, 2500 HD, 3500 HD
• Also fits select Buick, Cadillac, Chevy and GMC applications
• Sensor locations by application: B1S1, B1S2, B2S1, B2S2 (bank and sensor number)
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 325 mm (12.8 in.) overall length
• Male/female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue