Aikace-aikacen BMW,
OEM: 857646901 , 5WK9 6697B , 5WK96697B
NOX yana nufin mafi mahimmancin oxygen oxides, wato nitrogen monoxide (NO) da nitrogen dioxide (NO2), kuma ya ƙunshi atom N (nitrogen) da O (oxygen).NOx na'urori masu auna firikwensin suna auna yawan iskar oxygen da nitrogen oxide a cikin abun da ke tattare da iskar gas kuma ana iya kasancewa a baya da gaban mai kara kuzari na SCR.Suna ba da damar duba ayyukan tsarin tsaftacewar iskar gas da kuma ƙayyade daidai lokacin da ya kamata a yi aikin kulawa ko lokacin da ake buƙatar maye gurbin abubuwan da ba su da kyau.