51 71 1 823 859 : Left-hand door seal on body for BMW Series 3 E21

This left-hand door seal on body is a new part designed for the BMW Series 3 E21, intended to restore the seal between the door and the body pillar. A failing seal causes water ingress, road noise and progressive deterioration of the door seals, making its replacement essential when restoring a classic vehicle. Its left-hand position distinguishes it from right-hand door seals, and it is installed directly on the body without modification. Using an original specification part guarantees precise fit and durability compatible with the requirements of careful restoration.