Over heating have a lot of causes but this definitely means something is wrong with your components. One of the components that you have to check is your thermostat since it is responsible for regulating the temperature of your BMW 528I. Your BMW 528I thermostat is made up of an outer body that houses the temperature sensitive paraffin based valve that opens and closed based on the coolant temperature of the vehicle. The crucial function of your BMW thermostat is to manage the temperature of the engine cooling system. A small portion of the volumetric flow is fed though the radiator. Several processes are involved which are in need of a fully functional BMW 528I thermostat. However, time will cone that you have to replace your BMW thermostat because of daily wear and tear. But before this happens and if you do not want to loose the quality of your BMW thermostat, make sure that you will replace it with a new BMW Wahler thermostat. You can have it either through local stores or online delares like us. Our store guarantees only the high quality thermostats for your precious BMW including the top rated Wahler thermostat. You can call our friendly customer service at your most convenient time. Come and avail of our fast and easy services.