Shadowline Motorsport R4 LED CANBUS Module
If you drive a modern high-end vehicle, it may be equipped with an advanced electrical check system and protocol known as CANBUS. This checks the function of various electrical components for functionality such as your headlights. When upgrading from halogen or HID bulbs to LED bulbs there is a large deficit in electrical load which may cause the CANBUS system to trigger false error messages. When you add this product inline with the R4 LED bulbs it will balance the load so errors are eliminated.