crumple zone
noun [ C ] UK uk/ˈkrʌm.pəl ˌzəʊn/ us/ˈkrʌm.pəl ˌzoʊn/
（汽车的）防撞缓冲区，冲撞吸收带
a part of a car that is designed to crumple easily in an accident and so protect the people inside from being hit too hard
The car has front and rear crumple zones and two side-impact protection bars. 这辆汽车前后都有缓冲区，两边有防撞护条。