Starter for a motor vehicle heat engine, comprising an electric motor, the electric motor comprising a brush-holder assembly for an electric motor, a commutator, a yoke frame and a bearing, the brush-holder assembly comprising: • at least one brush-holder • a support plate for this brush-holder comprising: - a central through hole for the commutator of the electric motor; - guiding elements receiving at least the brush-holder with runner link on the plate in a direction radial to the central through-hole, the plate being arranged to allow the mounting of the brush-holder with runner link on the plate by engaging the brush-holder with the guiding elements in the direction going from the periphery of the plate to the central through-hole; the plate further comprising an anti-return abutment for each brush-holder after mounting the latter with runner link on the plate, the abutment rigidly opposing the brush-holder at least in the direction going from the periphery of the plate to the central through-hole, wherein: - the abutment is elastically retractable to allow the mounting of the brush-holder with runner link on the plate in the direction going from the periphery of the plate to the central through-hole; and - the abutment rigidly opposes the displacement of the brush-holder in the direction going from the central through-hole to the periphery of the plate, characterized in that the plate is made of sheet metal and in that the abutment and the guiding elements of the runner link are formed from the plate by cutting and plastic deformation of the sheet. • at least one brush-holder • a support plate for this brush-holder comprising: - a central through hole for the commutator of the electric motor; - guiding elements receiving at least the brush-holder with runner link on the plate in a direction radial to the central through-hole, the plate being arranged to allow the mounting of the brush-holder with runner link on the plate by engaging the brush-holder with the guiding elements in the direction going from the periphery of the plate to the central through-hole; the plate further comprising an anti-return abutment for each brush-holder after mounting the latter with runner link on the plate, the abutment rigidly opposing the brush-holder at least in the direction going from the periphery of the plate to the central through-hole, wherein: - the abutment is elastically retractable to allow the mounting of the brush-holder with runner link on the plate in the direction going from the periphery of the plate to the central through-hole; and - the abutment rigidly opposes the displacement of the brush-holder in the direction going from the central through-hole to the periphery of the plate, characterized in that the plate is made of sheet metal and in that the abutment and the guiding elements of the runner link are formed from the plate by cutting and plastic deformation of the sheet. - a central through hole for the commutator of the electric motor; - guiding elements receiving at least the brush-holder with runner link on the plate in a direction radial to the central through-hole, - the abutment is elastically retractable to allow the mounting of the brush-holder with runner link on the plate in the direction going from the periphery of the plate to the central through-hole; and - the abutment rigidly opposes the displacement of the brush-holder in the direction going from the central through-hole to the periphery of the plate, characterized in that the plate is made of sheet metal and in that the abutment and the guiding elements of the runner link are formed from the plate by cutting and plastic deformation of the sheet.