Replace OE Numbers: ①234-4668, 12569429, 12573167, 12583804, 12576131, 12573005, 12583290, 12584925, 12587785, 12590790, 12594452, 8125731670, 12596558, 12597878, 12607410, 12609001, 12611127 ②234-4066, 21024460, 12568221, 12578576, 2344109 Compatible Vehicle Model: Oxygen sensor Compatible with Chevy Models: 2005-2010 Cobalt 2.2L L4丨2006-2008 Cobalt 2.4L L4丨2006-2011 HHR 2.2L L4丨2009-2011 HHR 2.4L L4; Compatible with Pontiac Models: 2007-2009 G5 2.2L L4丨2007-2008 G5 2.4L L4; Compatible with Saturn Models: 2005-2006 Ion 2.2L L4丨2006 Ion 2.4L L4丨2006-2007 Vue 2.2L L4丨2007 Vue 2.4L L4…Vehicle Specific: Check fitment/pictures/product details page information in the listing for compatibility High Performance: The SYKRSS oxygen sensor meets OE standards, and Front/Back/Upstream/Downstream compatibility; is made of stainless steel and high temperature resistant materials and is installed in the vehicle exhaust pipe to accurately detect air mixture and engine combustion conditions, optimizing engine performance and saving fuel consumption Installation Instructions: To avoid burns, please wait for the vehicle exhaust pipe to completely cool down before operating; During the disassembly process, please be very careful not to damage the exhaust pipe and oxygen sensor threaded parts, and use professional disassembly tools Professional Services: 234-4668:45CM wire harness and 40CM head; 234-4066:45CM wire harness and 39.5CM head; Please check the length of the plug and sensor before purchasing to avoid purchasing an unsuitable oxygen sensor; SYKRSS have been deeply involved in the automotive parts industry for many years. If you have any questions during the purchasing process, please feel free to let us know Compatible Vehicle Model: Oxygen sensor Compatible with Chevy Models: 2005-2010 Cobalt 2.2L L4丨2006-2008 Cobalt 2.4L L4丨2006-2011 HHR 2.2L L4丨2009-2011 HHR 2.4L L4; Compatible with Pontiac Models: 2007-2009 G5 2.2L L4丨2007-2008 G5 2.4L L4; Compatible with Saturn Models: 2005-2006 Ion 2.2L L4丨2006 Ion 2.4L L4丨2006-2007 Vue 2.2L L4丨2007 Vue 2.4L L4…Vehicle Specific: Check fitment/pictures/product details page information in the listing for compatibility