A VEHICLE DOOR SYSTEM AND A METHOD FOR IMPROVING DURABILITY OF A DOOR SYSTEM

A door system (2) for a vehicle (1) comprising a vehicle body structure (3) and a first door structure (4) with a first door beam (7) extending between a lower part (3a) and an upper part (3b) of the vehicle body structure (3) when the first door structure (4) is in a closed position. A first bracket (8) is attached to a lower end (7a) of the first door beam (7) and arranged to run in a first guide rail (9) arranged in the vehicle body structure (3). The first guide rail (9) comprises a first recession (10). The first bracket (8) comprises a first protrusion (11) arranged at a bottom end (8a) of the first bracket (8). Upon a roof crush, the first protrusion (11) and the first recession (10) in the first guide rail (9) is arranged to engage to prevent separation of the first door structure (4) from the vehicle body structure (3).