Rust along the lower edge, loose hinges and tired gas springs that can no longer hold the hatch up are classic wear points on the large tailgate of the 145, the wagon body in the 140 series. Once the rubber seal no longer seals, moisture creeps into the cargo area and accelerates rust attack in the sheet metal seam.
This category covers parts for the hatch mechanism itself and the sealing: hinges and gas springs for mounting and function, rubber seal and metal trim for sealing and edge protection, plus lock brace, cover plate and the associated screws and washers for fastening. During restoration the play in the hinges, the lifting force of the gas springs and the condition of the rubber seal are typical check points before the hatch is adjusted to the body.
Since the 145 is the five-door version with a tailgate, the parts differ from the smaller trunk lid of the sedan models, so always check against your version.