Injin simintin ƙarfe mai girman monolithic ba wai kawai yana aiki don ingantaccen masana'antu ba, har ma ga abin hawa kanta, saboda yana rage aikin tambari da walda, don haka yana iya magance matsalar sauti mara kyau na jiki; Don aminci, tsarin ƙira mai haɗawa zai kuma kawo ƙira mai haɗaka sosai, wanda zai lalace lokacin da amincin jiki zai inganta sosai.

Ma'aikacin fasaha yana da la'akari da ƙira da yawa don magance amincin hatsarin kwatsam. A cikin ƙirar tsarin jikin Model Y, ana la'akari da yanayi takwas na karo, kamar karo na gaba, karo na gefe da birgima, ana la'akari da su. Tesla na iya gudanar da kuma cinye ƙarfin tasirin karo ta hanyar ƙira mai kyau ta tsarin jiki, katakon ƙarfe na gaba da na baya, akwatunan shan makamashi da sauran na'urori don kare lafiyar masu zama ta hanya mai kyau.

Jikin Model Y yana amfani da firam ɗin jikin ƙarfe da aluminum, kuma an ƙarfafa mahimman sassan da ƙarfe boron mai ƙarfi, wanda zai iya jure manyan ƙarfin tasiri. Zoben ƙofa na ciki da na waje na ma'aunin zafi da sanyi (ƙarfe na boron), sandunan rufin gaba (ƙarfe na boron), da sandunan rufin baya (ƙarfe mai ƙarfi) suna samar da tsari mai zagaye wanda ke ba da tallafi mai ƙarfi ga jikin Model Y. Tsarin ƙira mai ƙirƙira na shimfiɗa fakitin batirin a ƙasan motar ya kuma inganta ƙarfin tsarin Model Y gaba ɗaya, yana rage haɗarin juyawa da mamayewa.