Headlight lighting light module for a motor vehicle, comprising: - at least one light source ; - a heat sink capable of dissipating the heat produced by said light source or sources ; - a reflecting surface capable of reflecting the rays of the light source or sources ; - a lens capable of deflecting the rays originating from the reflecting surface in order to form a light beam along an optical axis of the module; - a support of the lens and of the reflecting surface , said support being mounted on the heat sink ; the heat sink and/or the support comprising at least one, preferably at least two protrusions (6 3 ) in contact with the other of the heat sink and the support so as to maintain a predetermined distance between the heat sink and the support, the heat sink comprising a rear portion (6 1 ) supporting the light source and a front portion (6 2 ), the protrusion or protrusions (6 3 ) being on the front portion (6 2 ), characterized in that the lens comprises at least one, preferably at least two lower fixing tabs (8 1 ) extending vertically through the support , the support has a slot, the lower fixing tab or tabs (8 1 ) extending through this slot, the heat sink comprising at least one, preferably at least two tabs (6 4 ) cooperating by engagement with an opening in the fixing tab or tabs (8 1 ) of the lens , respectively, said engagement is on the front portion (6 2 ) of said heat sink , said front portion (6 2 ) comprises said at least one, preferably at least two tabs (6 4 ) which extend towards the front and cooperate by engagement with the opening in the fixing tab or tabs (8 1 ) of the lens , respectively, and said engagement preferably has a vertical play less than 0.5 mm, more preferably a vertical play less than 0.1 mm, still more preferably is vertically clamped. - at least one light source ; - a heat sink capable of dissipating the heat produced by said light source or sources ; - a reflecting surface capable of reflecting the rays of the light source or sources ; - a lens capable of deflecting the rays originating from the reflecting surface in order to form a light beam along an optical axis of the module; - a support of the lens and of the reflecting surface , said support being mounted on the heat sink ; the heat sink and/or the support comprising at least one, preferably at least two protrusions (6 3 ) in contact with the other of the heat sink and the support so as to maintain a predetermined distance between the heat sink and the support, the heat sink comprising a rear portion (6 1 ) supporting the light source and a front portion (6 2 ), the protrusion or protrusions (6 3 ) being on the front portion (6 2 ), characterized in that the lens comprises at least one, preferably at least two lower fixing tabs (8 1 ) extending vertically through the support , the support has a slot, the lower fixing tab or tabs (8 1 ) extending through this slot, the heat sink comprising at least one, preferably at least two tabs (6 4 ) cooperating by engagement with an opening in the fixing tab or tabs (8 1 ) of the lens , respectively, said engagement is on the front portion (6 2 ) of said heat sink , said front portion (6 2 ) comprises said at least one, preferably at least two tabs (6 4 ) which extend towards the front and cooperate by engagement with the opening in the fixing tab or tabs (8 1 ) of the lens , respectively, and said engagement preferably has a vertical play less than 0.5 mm, more preferably a vertical play less than 0.1 mm, still more preferably is vertically clamped. <EOS>