i have this issue, is there a post discussing how to fix it? i've been searching and all i i could find was a post for another lexus model where they install their own (extra) vibration dampers. i've installed 1 so for and it helped a tiny bit but its still there.

 

Which vibration problem do you have? The drone when driving below 1500 rpms? Or the vibration at a stand still in drive that is felt through the steering wheel?

For the drone - there is a TSB to replace the underbody catalyst that includes a dampener. Which does not really resolve the problem.

The vibration in drive at a standstill felt at the steering wheel - it's the characteristic of the vehicle. There is no fix.

 

the one while driving, about 1500 rpm

 

that’s not how it works.

 

There is a thread regarding this. It's called the dreaded drone. There is no actual fix but only temporary solutions.