A process for electrical assistance to the braking of a vehicle with a motor system (M), whereby the motor system (M) includes at least one electric motor (10) whose output shaft (14) is coupled to a primary shaft (20) that drives at least one wheel (22) of the vehicle, at least one wheel (22) of the vehicle being equipped with a mechanical braking device that is activated by a hydraulic circuit, whereby the process is characterized in that it includes: collecting information in the hydraulic circuit of the primary braking circuit, and using the information as a set-point for a braking torque generated by the electric motor (10) and exerted on the primary drive shaft (20) of the wheels.