The Mazda 3 4dr trunk hatch is located towards the rear portion of your vehicle, the same area where cars or trucks have a compartment of luggage and cargo storage. The Mazda 3 4dr trunk hatch is the instrument that gives accesses to the compartment .They are built in with tail lights and are at time developed without them. The light weight Mazda 3 4dr hatch caters to a much smoother drive. Trunk hatches are considered to be heavy and thus several drivers are now going for a much lightweight hatch or lightweight trunk, which is made of strips of carbon fiber or fiberglass.