Iyo bumper ine mabasa ekudzivirira kuchengetedza, kushongedza mota uye kugadzirisa maitiro eaerodynamic yemotokari. Panyaya yekuchengetedza, inogona kuridza buffer chikamu chebuffer kana yakadzika-yekumhanyisa tsaona uye kuchengetedza kumberi uye kumashure muviri; Inogona kuchengetedza vanofamba netsoka kana tsaona nevanofamba netsoka. Panyaya yekutaridzika, inoshongedza uye yave chikamu chakakosha kurongedza kutaridzika kwemotokari; Panguva imwecheteyo, iyo mota bundu zvakare ine imwe yeiyo aerodynamic.
Panguva imwecheteyo, kuitira kuti uderedze kukuvara kune vafambi vari munzira dzinokanganisa tsaona, gonhi bumpers dzinowanzoiswa pamotokari kuti dzishandise simba rekunyepedzera kwemasuo. Iyi nzira inoshanda uye yakapusa, nekushandurwa kushoma kune chimiro chemuviri, uye chakashandiswa zvakanyanya. Pakutanga kwa1993 Shenezhen International mota Exhibition, Honda Accorct yakavhurwa chikamu chesuo kuti ifumure musuwo kune vateereri kuratidza kwayo kwekuchengetedza.
