Bumper yana da ayyukan kariya daga haɗari, ƙawata abin hawa da inganta halayen iska na abin hawa. Dangane da aminci, yana iya taka rawa wajen kiyaye haɗari idan hatsarin karo ya faru a cikin ƙarancin gudu da kuma kare gaba da baya; yana iya kare masu tafiya a ƙasa idan hatsari ya faru da masu tafiya a ƙasa. Dangane da kamanni, yana da ado kuma ya zama muhimmin ɓangare na ƙawata kamannin motoci; A lokaci guda, bumper ɗin motar yana da wani tasiri na iska.
A lokaci guda kuma, domin rage raunin da fasinjoji ke samu a haɗarin haɗari a gefen hanya, galibi ana sanya na'urorin bumpers na ƙofa a kan motoci don ƙara ƙarfin tasirin ƙofofi wajen hana karo. Wannan hanya tana da amfani kuma mai sauƙi, ba tare da wani canji a tsarin jikin mutum ba, kuma an yi amfani da ita sosai. Tun a bikin baje kolin motoci na ƙasa da ƙasa na Shenzhen na shekarar 1993, Honda Accord ta buɗe wani ɓangare na ƙofar don nuna na'urar bumpers ɗin ƙofa ga masu sauraro don nuna kyakkyawan aikinta na aminci.
