There is someone on the forum in which their LED DRLs have gone from a blue/white to very yellow...not sure if that one is on it's way out or not.
In fact does anyone knows the tell tale signs of LED lights failing. Dimming? Going yellow maybe?
For halogen, yes they get dimmer over time, and then one day they may flicker and go pop!
Bi-Xenons, I suspect, they tend to turn from white/blue light to purple, before they go pop..
LEDs, time will tell! Or do they go pop at all?
Saying that, i have seen before a 2005? Passat with LED tail lights, and noticed that some were not working...
These ones:
So I guess they can fail ultimately....
These do fail, my mate has these (very similar)on his VW Golf Plus and had to have both sides replaced as half a dozen of the individual LEDs had gone, from memory i think he had to pay 50% of the cost.