The plastic part that broke on the handles are also used on 740 models and are much heavier parts--strength wise---If I remember correctly the part has two screws holding it on and the wire threads on by turning the handle from side to side to thread it off and back on--by just replacing the plastic part--you can use another plastic part from either side of a donor car --or handle. Volvo will not sell the little plastic piece to you--the one that keeps breaking.