A vehicle door assembly with an inner door panel, an outer door panel and a reinforcement assembly. A first attachment area is defined adjacent to an upper edge and a forward edge and a second attachment area is defined adjacent to the upper edge and a rearward edge of the inner door panel. The inner door panel and the outer door panel are fixedly attached to one another and define a hollow space therebetween. The reinforcement assembly has a first end fixedly attached to the first attachment area of the inner door panel and a second end fixedly attached to the second attachment area of the inner door panel. A mid-section extends of the reinforcement assembly extends along the upper edge of the outer door panel. The mid-section of the reinforcement assembly and the upper edge of the inner door panel define a window receiving slot therebetween.