The LED strips in the rear lights have been out for a while, now the car is back on the road it's time to get them working as they should.
Background info :
I bought a spare pair of lights as one of my orignals was cracked, this made me a lot more relaxed about cutting the lights open.
Most of the lights on the car use normal bulbs (£1 each), there are also 4 sets of LED strip lights (both back lights, and 2 in the bootlid).
The LEDs are part of a sealed light unit, if they fail, BMW expect you to buy a new light assembly
I have seen a light with 1 bar out and 2 bars working, mine had 1 faulty LED that stopped all 3 bars - fix the 1 faulty LED and all 3 work again.
The LEDs out didn't show any warnings on the dash so be aware you might have lights out and not know.
Tools required :
8mm deep socket to remove the light cluster from the car
Torx to remove the bulb holder from the light unit (thanks BMW - why make life easy)