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.