Second, I have tried this from another forum .... DID NOT WORK EITHER for ME!
WARNING: While doing this the car battery ran down. Had to jump start and recharge battery before trying again.
https://www.clublexus.com/forums/gs-4th-gen-2013-2020/846952-memory-driver-seats-not-working.html
DID NOT WORK either :
The ignition switch was put in ON mode. (foot off the brake, press Start twice, not running, all lights on dash lit).
1). While I stood outside the car so I did not obstruct seat motion, the seat was moved back as far as it would go.
It stopped going back, a few clicks so I took my finger off the switch, then started it back again. Few more clicks. I didn not hear any beeps.
2). Then I did the same thing moving the seat all the way forward until it would not move any further forward.
3). Next, I tilted the seat back all the way. A few clicks at the end and release then re-press the button a few more clicks, no beeps.
4). Then I did the same tilting the seat all the way forward.
After this, the seat memory buttons DID not work for me but for the author it did as he said.
(I did not do this for the seat height or seat bottom projection.)
Passenger side still operational and have all of the 3 settings. Driver side buttons still dead.