Package included： 2 X Oxygen Sensors Part Number/OEM Number： 234-9123 (4-wire oxygen sensor): Upstream X1 234-4445 (4-wire oxygen sensor): Downstream X1 Compatible Vehicle(for reference only)： (Please refer to compatibility chart for details) 2006 Saab 9-2X 2.5L H4 Non-Turbo 2006-2010 Subaru Forester 2.5L H4 Non-Turbo 2006-2011 Subaru Impreza 2.5I 2.5L H4 Non-Turbo 2006-2011 Subaru Impreza Outback Sport 2.5L H4 Non-Turbo 2008-2009 Subaru Impreza Sport 2.5L H4 Non-Turbo 2006-2009 Subaru Legacy 2.5L H4 Non-Turbo 2006-2009 Subaru Outback 2.5L H4 Non-Turbo .
