Well Auto Air Fuel Ratio Sensor Upstream 02-03 Lexus ES300 Rear 03-04 Toyota 4Runner 4.0L Right 02-06 Camry 3.0L Rear 05-09 Subaru Outback 06-07 B9 Tribeca 3.0L 08-09 Tribeca 3.6L 08-09 Legacy 3.0L OE Replacement Parts One Year Warranty Quality Parts Made in Taiwan by OEM Manufacturer 02-03 Lexus ES300 3.0L Upstream Rear 03-04 Toyota 4Runner 4.0L Upstream Right 02-06 Toyota Camry 3.0L Up Upstream Rear 05-09 Subaru Outback 3.0L Upstream 06-07 Subaru B9 Tribeca 3.0L Upstream 08-09 Subaru Tribeca 3.6L Upstream 08-09 Subaru Legacy 3.0L Upstream