Hey, I'm thinking everyone's side view mirrors shake when on the highway (or at least the drivers side). It has been really irritating and I don't see a fix for it (maybe I'm the only one who notices ). Nothing to adjust screw wise. Go out to your RX300 and see what I mean, there is a little play on that damn plastic swivel housing attaching the mirror to the swivel bracket on the body of the car. I can't figure out how to make it steady.

 

My mirror doesn't shake, and It's been tested all the way up to the fuel cutoff point (ie. 112 mph) ...On a closed road of course

I've seen it shake once when wind gusts were extremely high, around 40 mph, and I was traveling at highway speeds (70 mph). That was one hell of at time, considering the RX doesn't like crosswinds very much, nor does any other SUV for that matter.

 

I don't notice it on mine, but here is one solution.

https://www.clublexus.com/forums/rx-...ror-shake.html