A door assembly for a vehicle, comprising: an outer panel; an inner panel connected to the outer panel, wherein the inner and outer panels (13, 14) together form a door panel structure defining a door cavity between the inner and outer panels (13, 14), the door panel structure having an opening providing access to the door cavity, wherein the inner panel includes a latch reinforcement structure that is connected with a door latch and is configured to transfer forces from the door panel structure to a body of the vehicle through the door latch and wherein the inner panel includes a hinge reinforcement structure that is connected with a door hinge and is configured to transfer forces from the door panel structure to a body of the vehicle through the door hinge; a carrier/intrusion member assembly, including a carrier and an intrusion member separate from the door panel structure, the intrusion member extending across the door cavity, and the intrusion member being mounted to the door panel structure and connected to the carrier; and a plurality of door hardware components extending into the door cavity and being mounted to at least one of the carrier and the intrusion member; wherein the carrier has a peripheral edge and sealingly engages the inner panel along the peripheral edge, wherein the intrusion member has at least one end that extends past the peripheral edge of the carrier and further having a latch end that connects to the latch reinforcement and a hinge end that connects to the hinge reinforcement structure. an outer panel; an inner panel connected to the outer panel, wherein the inner and outer panels (13, 14) together form a door panel structure defining a door cavity between the inner and outer panels (13, 14), the door panel structure having an opening providing access to the door cavity, wherein the inner panel includes a latch reinforcement structure that is connected with a door latch and is configured to transfer forces from the door panel structure to a body of the vehicle through the door latch and wherein the inner panel includes a hinge reinforcement structure that is connected with a door hinge and is configured to transfer forces from the door panel structure to a body of the vehicle through the door hinge; a carrier/intrusion member assembly, including a carrier and an intrusion member separate from the door panel structure, the intrusion member extending across the door cavity, and the intrusion member being mounted to the door panel structure and connected to the carrier; and a carrier and an intrusion member separate from the door panel structure, the intrusion member extending across the door cavity, and the intrusion member being mounted to the door panel structure and connected to the carrier; and a plurality of door hardware components extending into the door cavity and being mounted to at least one of the carrier and the intrusion member; wherein the carrier has a peripheral edge and sealingly engages the inner panel along the peripheral edge, wherein the intrusion member has at least one end that extends past the peripheral edge of the carrier and further having a latch end that connects to the latch reinforcement and a hinge end that connects to the hinge reinforcement structure.