A modular vehicle includes a base body having a frame, driver compartment, chassis, motor and wheels, a removable modular component adapted to be locked and unlocked therefrom, and locks that fasten the removable modular component within the base body. The removable modular component provides added structural rigidity to the frame when installed, and can comprise at least 20 percent of the overall volume and at least 20 percent of the overall weight of the entire vehicle. Locks permit the modular component to be removed and replaced with another removable modular component when said locks are unlocked. Various modular components can be directed toward medical, weapons, fire equipment, rescue equipment, hunting supplies, reconnaissance, command center, outback vehicle, or a survival camper. A triangular truss support system provides increased support and protection for the underside of the vehicle, such as for when the vehicle runs over an IED or other destructive device.