Hey guys want to ask regarding the VS (Voltage Stabilizer) is it good to use? What I mean is. Is it needed? I do a research its good to stabilize our car electric so there will have more power. Japanese car used it aswell.. But how bout BMW? Anyone using it? Last time I use the imitation one and damage my car battery. If use the ori one is it ok? Or BMW already had the voltage stabilizer system install... My car is E34..