This 4-wire narrow-band oxygen sensor fits 2009-2011 Chevy Aveo, Aveo5, 2018-2021 Chevy Beat, 2009-2010 Pontiac G3 and 2009 Pontiac G3 Wave in the downstream position 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.

Walker Products 350-34321 Oxygen Sensor Features:

• Fits 2009-2011 Chevy Aveo, Aveo5; 2018-2021 Chevy Beat; 2009-2010 Pontiac G3; 2009 Pontiac G3 Wave
• Engine coverage includes 1.2L I4, 1.6L I4 applications
• Sensor location by application: B1S2 (bank and sensor number)
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 475 mm (18.7 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue