Dear,
Thanks for contact us and apologizes for the late response.
1.yes,our unit retain the rear seat climate and audio controls.
2.yes, our unit keep functionality of the rear arm rest controls in a 2001 ls430 without a navigation screen.
this unit can't fit your car,you need to buy below one,it can fit your car perfectly.
https://www.seicane.com/for-lexus-ls430-low-end-2001-2006-radio-gps-navigation-system-with-hd-touchscreen-bluetooth-support-carplay-obd2-h6836
Android 10.0, 2G+32G, Quad-core CPU, Plug and play, SWC, Siriusxm App, built-in DSP carplay/Android Auto
Instant payments are very important; the earlier you pay, the sooner you will get the item.
Please feel free to contact us, we are always at your service.
Looking forward to your purchase.
Have a nice day.
By
Seicane