A fixing assembly for fixing an accessory to a vehicle component; the assembly comprising: - - a support element adapted to be fixed to said component or forming part of said component; said support element comprising a first face and a second face opposite to said first face along a first direction; - - a frame adapted to support said accessory in a relative fixed position and having a third face, at least partially facing said second face, and a fourth face opposite to said third face along said first direction; - - fixing means that connect said frame to said support element in a fixed position; said fixing means comprising: - - at least one opening formed in one of said support element and said frame and at least one protruding pin forming part of the other of said support element and said frame; said protruding pin engaging said opening so as to enable a rotation of said frame with respect to said support element about a second direction, orthogonal to said first direction, during a mounting step in which said protruding pin is inserted in said opening; and - - snap-fitting means for preventing the displacement of said frame from said support element along said first direction at the end of the aforementioned rotation; wherein said snap-fitting means comprise at least one retention shoulder on one of said support element and said frame, and at least one elastically deformable element snap-fitted to said retention shoulder and forming part of a portion made of polymeric or elastomeric material of the other of said support element and said frame; characterized in that said fixing means further comprise blocking means for blocking said frame with respect to said support element; said blocking means comprising: at least a first hole formed in said support element along an axis parallel to a third direction, at least a second hole formed in said frame coaxially to said first hole, and at least one fixing pin engaging said first and second holes (10, 11); said third direction being orthogonal to said first and second directions (Y, X). - - a support element adapted to be fixed to said component or forming part of said component; said support element comprising a first face and a second face opposite to said first face along a first direction; - - a frame adapted to support said accessory in a relative fixed position and having a third face, at least partially facing said second face, and a fourth face opposite to said third face along said first direction; - - fixing means that connect said frame to said support element in a fixed position; said fixing means comprising: - - at least one opening formed in one of said support element and said frame and at least one protruding pin forming part of the other of said support element and said frame; said protruding pin engaging said opening so as to enable a rotation of said frame with respect to said support element about a second direction, orthogonal to said first direction, during a mounting step in which said protruding pin is inserted in said opening; and - - snap-fitting means for preventing the displacement of said frame from said support element along said first direction at the end of the aforementioned rotation; - - at least one opening formed in one of said support element and said frame and at least one protruding pin forming part of the other of said support element and said frame; said protruding pin engaging said opening so as to enable a rotation of said frame with respect to said support element about a second direction, orthogonal to said first direction, during a mounting step in which said protruding pin is inserted in said opening; and - - snap-fitting means for preventing the displacement of said frame from said support element along said first direction at the end of the aforementioned rotation; wherein said snap-fitting means comprise at least one retention shoulder on one of said support element and said frame, and at least one elastically deformable element snap-fitted to said retention shoulder and forming part of a portion made of polymeric or elastomeric material of the other of said support element and said frame; characterized in that said fixing means further comprise blocking means for blocking said frame with respect to said support element; said blocking means comprising: at least a first hole formed in said support element along an axis parallel to a third direction, at least a second hole formed in said frame coaxially to said first hole, and at least one fixing pin engaging said first and second holes (10, 11); said third direction being orthogonal to said first and second directions (Y, X).