This is for the hard core RCF clan, I'm missing a tiny square that is probably glossy black, goes hear the top of the rear window and I suppose is to cover up the screw that is underneath. Anyone know what part that is? Can't be larger than half an inch or so.

 

In this parts explosion?

a1_615066F.jpg (1592×1099) (lexus.com)

 

It's part of the rear stop lamp. Less than a $2 part.
https://parts.belllexusnorthscottsda...6420-8117.html

 

That's it, thank you so much! I'm pleased this isn't that expensive. I had a part about twice as large on my SL500 that was $400, yikes!