Bumper ifite imirimo yo kurinda umutekano, gushushanya ikinyabiziga no kunoza ibimenyetso bya Aerodynamic biranga ikinyabiziga. Ku bijyanye n'umutekano, imodoka irashobora kugira uruhare bunenga ku mpanuka yo kugongana yo kugongana no kurinda umubiri imbere kandi inyuma; Irashobora kurinda abanyamaguru mugihe impanuka hamwe nabanyamaguru. Kubijyanye no kugaragara, ni ibcorave kandi byabaye igice cyingenzi cyo gushushanya isura yimodoka; Muri icyo gihe, bumper yimodoka nayo ifite ingaruka zimwe na kimwe cya aerodynamic.
Muri icyo gihe, kugirango bagabanye ibikomere kubagenzi mugihe habaye impanuka kuruhande, ubunini bwumuryango mubisanzwe bwashyizwe kumodoka kugirango yongere imbaraga zo kurwanya imiryango. Ubu buryo ni ingirakamaro kandi byoroshye, hamwe nuburyo buke kumiterere yumubiri, kandi byakoreshejwe cyane. Mu ntangiriro z'imurikagurisha ry'imodoka ya 1993, Honda yafunguye igice cyumuryango kugirango yerekane umuryango utera imbere kubateze amatwi kwerekana imikorere myiza yumutekano.
Kwishyiriraho urugi bumper ni ugushiraho imitwe myinshi yicyuma. Birumvikana ko gushiraho urugi rw'urugi nta gushidikanya ko bizamura ibiciro bimwe by'abakora imodoka, ariko kubagenzi bashinzwe imodoka, umutekano no kumva umutekano bizongera byinshi.
