Car-specific interior LED kits include customized packages of LED bulbs to transform the car's filament bulbs into bright and low-power LED bulbs. The interior LED kits include the LED bulbs needed for the car's interior, but not the LEDs coming outside the car. The interior LED kits list and link the bulbs in the kit. If you don't need all the LED bulbs, you can choose the bulbs you want from the links and thus make your own custom LED series.
When installing LED bulbs, it is good to note that LED bulbs are polar. LED bulbs will not work if their poles are in the wrong direction - if the bulb does not work, only the polarity of the bulb will be reversed and the correction will be performed. It is therefore a good idea to test the functionality of the installation before putting all the panels closed.