^ ya almost all Lexi do that.
The little MCD needles are designed for a lower voltage system, but Toyota uses them in a higher votlage than they're rated for.
At about 6 years, they become prone to simply overheating. That's why you always drive with them about half way up the knob.
O-L-T, who is a super mod at ClubLexus.com does replacement needles for about 1/3 the cost lexus does.
He can do custom color dashes/match lighting also (including cliamate/ radio controls)
on top of that he's a hella nice guy.