what i did is ....on x5...ordered 7x6418 bulbs and 4x t194 and 2x 194 extra strong bulbs for side mirror and trunk light...
I have attached where i got mine on amazon...

i ordered 8 pairs of thses and ran it through the whole car
--36mm Festoon 6 LEDs SMD LED Bulb White for 3021 DE3021 6411 6413 6418 DE3423 DE3425 Replacement (A Pair) =$80


I used these on my front dome light 3x
10x 194 168 2825 5-SMD White High Power LED Car Lights Bulb=$20


I used these one on my Side Mirror for better Light path and trunk light..

2x pairs-LEDwholesalers T10 LED 194 Wedge bulbs Dash Dome Light 12v DC 15 SMD LED 1.44 Watt 105 Lumen White, 1415WH= $25

HOPE THESE HELPED YOU.

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Past
2000 E46 325i
2006 E53 4.4i Sport
2006 X5 4.8is
2011 E90 328xi
2011 E71 50i Fully Loaded :thumb up:
Current
2000 E39 528i
2013 F10 M5
2013 F10 535xi
2017 X3
2017 Sedona
2017 Optima
2016 Fiesta