Matsayin ƙananan kariyar farantin gaban motar: 1, don hana ƙananan abubuwa fantsama cikin injin injin yayin tuƙi, haifar da lahani ga injin, ko taɓa kwanon man injin lokacin jan ƙasa, yana shafar aiki na yau da kullun na injin, yayin da yake kiyaye sashin injin mai tsabta; 2, a yayin da ake yin yawo, yana iya hana ruwa fantsama cikin injin injin, da kuma hana sashin wutar lantarki jika da ruwa da haifar da matsala.