***** Thanks MUD, I've gotten so much info and help from this forum... hope this helps someone *****
FIXED 2013 LX570 Tilt Steering for $53 (+tax/Shipping) --- using LS460 (2007-2009) part found on eBay.
eBay Part was an exact replacement! Same Connector, mounting points & hardware, etc.
1 unit, "Last One", still available on eBay at time of this posting.
(also note, for about a $100+, other sellers had LS460 steering column for sale, pictures looked to have the tilt and telescopic assembly's on them)
eBay Description = "Lexus LS460 Steering Column Tilt Motor w/Mechanism 2007-2009 OEM"
See Link below, and attached Picture of the eBay page.
( Disclaimer -- First, I bought from this seller, but really have no idea if part seller misidentified the part, or if it is really from an LS460. Second, ad says LS460, not LX460 which I initially thought )
=== Tilt Steering Issue ===
2013 LX570 Tilt-Steering stopped working, motor could be heard running but not tilting up/down.
After removal, issue was that "worm gear" had cut through 3-4 teeth of the "work wheel" so gears would not engage anymore when it hit that position.
=== Fix Path ===
Could not find LX570 Tilt Assembly parts sold by Lexus/Toyota, or on internet.
Entire Steering Column for over $2400 would fix, but No Thanks on that.
No Salvage/Junk yards nearby had any LC/LX 200's.
As a challenge had my High School son make a replacement "worm wheel" on his 3D printer. Just a learning challenge for him, his 3D printed worm wheel lasted 3 weeks under intense usage. Not bad, but never going to work long term, there is pretty intense load/torque on the OEM worm wheel (OEM is steel/nylon).
Meanwhile... Kept Looking for options.
On eBay, found $53 "LS460 tilt assembly" that looked exactly the same, so I took a chance.
After part arrived, it was an exact copy of my original OEM 2013 LX570 part as far as I could tell.
When installed... it was an exact fit and replacement. Same Connector, mounting points & hardware, etc.
It has been working for 3+ months, no problems.
I'm satisfy the Tilt-Steering is fixed.
To get many years of longevity, hopefully, I turned off "ALL" automated Tilt-Steering functions.
Some settings can be changed on Infotainment "Setting" menu. But found it did not turn everything off, especially if "Easy Exit" feature was turned on.
I used Tech Stream to ultimately turn-off all the automated functions.
Tilt only operates now if...
1) I use the manual Tilt button on Steering column.
2) I press any of the presets for driver settings using the Lexus Memory System
FIXED 2013 LX570 Tilt Steering for $53 (+tax/Shipping) --- using LS460 (2007-2009) part found on eBay.
eBay Part was an exact replacement! Same Connector, mounting points & hardware, etc.
1 unit, "Last One", still available on eBay at time of this posting.
(also note, for about a $100+, other sellers had LS460 steering column for sale, pictures looked to have the tilt and telescopic assembly's on them)
eBay Description = "Lexus LS460 Steering Column Tilt Motor w/Mechanism 2007-2009 OEM"
See Link below, and attached Picture of the eBay page.

Lexus LS460 Steering Column Tilt Motor w/Mechanism 2007-2009 OEM | eBay
For:2007-2009 Lexus LS460 LS600hL.
www.ebay.com
( Disclaimer -- First, I bought from this seller, but really have no idea if part seller misidentified the part, or if it is really from an LS460. Second, ad says LS460, not LX460 which I initially thought )
=== Tilt Steering Issue ===
2013 LX570 Tilt-Steering stopped working, motor could be heard running but not tilting up/down.
After removal, issue was that "worm gear" had cut through 3-4 teeth of the "work wheel" so gears would not engage anymore when it hit that position.
=== Fix Path ===
Could not find LX570 Tilt Assembly parts sold by Lexus/Toyota, or on internet.
Entire Steering Column for over $2400 would fix, but No Thanks on that.
No Salvage/Junk yards nearby had any LC/LX 200's.
As a challenge had my High School son make a replacement "worm wheel" on his 3D printer. Just a learning challenge for him, his 3D printed worm wheel lasted 3 weeks under intense usage. Not bad, but never going to work long term, there is pretty intense load/torque on the OEM worm wheel (OEM is steel/nylon).
Meanwhile... Kept Looking for options.
On eBay, found $53 "LS460 tilt assembly" that looked exactly the same, so I took a chance.
After part arrived, it was an exact copy of my original OEM 2013 LX570 part as far as I could tell.
When installed... it was an exact fit and replacement. Same Connector, mounting points & hardware, etc.
It has been working for 3+ months, no problems.
I'm satisfy the Tilt-Steering is fixed.
To get many years of longevity, hopefully, I turned off "ALL" automated Tilt-Steering functions.
Some settings can be changed on Infotainment "Setting" menu. But found it did not turn everything off, especially if "Easy Exit" feature was turned on.
I used Tech Stream to ultimately turn-off all the automated functions.
Tilt only operates now if...
1) I use the manual Tilt button on Steering column.
2) I press any of the presets for driver settings using the Lexus Memory System