OEM grade downstream oxygen sensor for 2009-2011 Chevrolet Aveo and Aveo5 1.6L L4 engines Key benefits - Direct OEM replacement: restores original sensor performance with standard equipment specs for reliable operation. - Easy installation: designed for straightforward swap without modification. - Emissions and fuel management: downstream sensor provides critical data to the engine control unit after the catalytic converter to support proper fuel trim and emissions control. - Durable, OEM quality: built to meet the same standards as the original equipment parts. Compatibility and parts reference - Fit 2009-2011 Chevrolet Aveo L4-1.6L Downstream - Fit 2009-2011 Chevrolet Aveo5 L4-1.6L Downstream - OEM numbers: 96951720, 25189500, 9024423, 234-4289, 96964230 What it does - Monitors exhaust conditions after the catalytic converter to help the ECU regulate fuel delivery and maintain emissions compliance. - Serves as a direct replacement for the original downstream oxygen sensor, maintaining proper exhaust monitoring and system balance. Practical use scenarios - Diagnostic repair: when a service check indicates a faulty downstream O2 sensor, install this OEM replacement to restore proper sensor readings and engine management. - After catalytic converter work: replace the downstream sensor after replacing the catalytic converter to ensure the emissions system is properly monitored. - Routine emissions maintenance: during planned maintenance for 2009-2011 Aveo models, replace the downstream sensor to uphold accurate fuel trims and emissions performance.