Ufakelo lwe-bumper guard yomnyango kukubeka imiqadi yentsimbi ephezulu ethe tyaba ngokuthe tye okanye ngokutyibilikayo kwiphaneli yomnyango womnyango ngamnye, edlala indima yonogada bangaphambili nangasemva, ukuze yonke imoto "ipheleke" ngasemva. i-bumper guards ngaphambili, ngasemva, ekhohlo nasekunene, eyenza "udonga lobhedu kunye nodonga lwentsimbi", ukwenzela ukuba abakhweli beemoto babe neyona ndawo ikhuselekileyo yokhuseleko. Ngokuqinisekileyo, ukufaka olu hlobo lomnyango we-bumper guard emva kwamathandabuzo kuya kwandisa iindleko ezithile kubenzi beemoto, kodwa kubakhweli beemoto, ukhuseleko kunye nemvakalelo yokhuseleko luya kwandisa kakhulu.