Attention 1 Please check the LED light base type and size of your vehicle to confirm if the item will fit it 2 As a safety precaution make sure the car has had time to cool down properly before starting the installation process 3 Make sure the ignition turned off and the keys removed 4 Fully examine the connection of the contact points ports and the wires as faulty connections can cause lighting problems 5 For some vehicles like for Audi for BMW for Mercedes etc which have on board computer OBC CANBUS the warning signal is initiated on the dashboard such as lights out codes or any other error messages because the power consumption of LED bulb is far below than the original value of halogen bulb This is not a problem with the quality of our products you might need to add a LED Load Resistors with LED bulb to eliminate error message Or if need the bulb for turning light need the LED Load Resistors Feature 1 1 1 design Led bulb is almost same ratio to stock bulb fits for 99 of vehicles no need to modify or change dust cover truly plug n play installation takes just minutes2 FANLESS DESIGN No fan structure No noise Can avoid the fan stop working in a dusty environment and will not appear that the fan does not turn causing the bulb to not light up 3 Intelligent cooling system AirCool intelligent frequency conversion heat dissipation Airlux circulating fan free cooling technology to ensure the lasting and stable brightness4 Intelligent