Chevrolet oxygen sensor 55566648/55566650 5WK91000 universal replacement for front and rear O2 sensors

This oxygen sensor is designed for 2007-2013 Chevrolet Cruze 1.6L/1.8L, 2010-2015 Malibu 2.0L/2.4L, and 2009-2014 Buick Excelle/Verano 1.6T, while also compatible with some GM Ecotec engines. It monitors exhaust oxygen content in real time and feeds ECU to adjust air-fuel ratio for combustion efficiency and emissions. OEM numbers 55566648/55566650 and 5WK91000; cross-check with original part numbers. Front/rear universal design simplifies inventory management; replacement difficulty: medium; recommended to use a dedicated socket, then after installation clear fault codes with a diagnostic tool and reset learned data. For B2B buyers, sensor uses high-temperature ceramic elements, compatible with standard-displacement models, suitable for bulk purchase for repair shops to stock.