Package Including: 1 x Upstream Oxygen Sensor 1 x Downstream Oxygen Sensor Installation Position: Upstream (location is between the catalytic converter and the engine) Downstream (After Catalytic Converte) Sensor Type: Heated Why Choose Our Sensor? 100% Factory tested Improve fuel economy ratio Ready to use, Direct Replacement Built to strict quality control standards Use highest grade material with OE+ durability High quality core components and double protective cover OEM Equivalent Part Numbers: 234-9138, 22641AA670, 234-4513, 22690AA960 Compatible with Subaru 2016-2017 Crosstrek 2.0L 2014 XV Crosstrek 2.0L Hybrid 2015 XV Crosstrek 2.0L 2015 XV Crosstrek 2.0L Hybrid 2014-2018 Forester 2.5L 2015-2017 Impreza 2.0L About Us DrCax are automotive-related brand,supplying mainly high quality auto parts for all over the world.Experienced in OEM service and Tuning parts for years.Our products are manufactured to the same specifications as the original ones. DrCax is an ideal choice to replace your broken parts.