It all depends on the output, if the light output it to high, the EU says automatic levelling and headlamp wash must be fitted. An eagle eyed MOT tester could fail you on this. Hence most HID kits are ilegal to use on the road. The factory LEDs must have an output lower than that limit, because they don't have headlamp wash, not sure about self level (not got my mini yet), also not sure what would be involved in swapping to LEDs.
If you want brighter headlights the easy route is more powerful bulbs, I can recommend Osram Nightbreakers, but even BMW sell more powerful bulbs. The only downside is bulb life is a little shorter.
If you want brighter headlights the easy route is more powerful bulbs, I can recommend Osram Nightbreakers, but even BMW sell more powerful bulbs. The only downside is bulb life is a little shorter.
