A steering control system for a vehicle comprising a steering input member controlled by a driver of the vehicle comprises a steering sensor for generating an electrical signal as a function of the position of the input member. The steering control system further comprises a steering actuator which operates on the steered wheels of the vehicle as a function of the electrical signal generated by the steering sensor. A steering controller receives the electrical signal generated by the steering sensor and provides a current to the steering actuator in order to operate on the steered wheels. An accumulation counter is operatively connected with the steering controller and is configured to calculate and record the accumulated workload of the steering controller by accumulating instantaneous workloads throughout operation thereof.