Word forms: (regular plural) side impact bars
noun (Automotive engineering: Vehicle components, Bodywork, controls, and accessories) A side impact bar is a long beam in a car door that is designed to protect passengers during a crash. ⇒ Side impact bars and side air bags may reduce injury. ⇒ The inner skin of a car door usually has stiffening ribs for strength and may also contain a side impact bar. ⇒ New safety regulations required all car doors to be fitted with side impact bars.
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