Abstract: A fastening structure for a vehicular mounting system includes: a mount core including an inner core and coupled to a vehicle body by being fixed thereto, a center bolt protruding in an upward direction from the inner core, and a support bracket mounted on the inner core in such a manner as to come into contact therewith. The support bracket is fastened to the mount core using the center bolt and coupled to a powertrain of a vehicle by being fixed thereto. In particular, the center bolt passes through the inside of the support bracket, and a mounting seating surface, on which the support bracket is seated, is formed on an upper surface of the inner core. The mounting seating surface includes a counterforce angle formation portion.

Abstract: A hydro engine mount for a vehicle may include a locking body including a plurality of locking portions; a body plate including a plurality of fastening grooves configured to be fastened to the plurality of locking portions, wherein a main rubber is mounted in the body plate; and a diaphragm stacked between the main rubber and the locking body.