I have the same issue on my 2017 LC200 currently at 105k. Just had the transmission fluid changed at the dealer and it subtly changed the behavior, but I'd say there are still issues in the 1-2-3 gear range... feels like it's hunting for a gear sometimes... will shift down and back up for no...
If this is still the main thread for aftermarket units...
I installed the Grom Vline in my 2017 LC about a month ago. I live in the city/street park and this was easy enough for me to do in about 1.5 hours. Note they don't have a full video for the 2016-2018 LC, so you have to use the video for...
The apps you can download from Google Play - do you have to access those through the Android Auto interface, or those will show up in CarPlay mode? I only have an iPhone, so not interested in Android Auto otherwise.
New Walker resonator for 100-series. I bought the whole system for my 1998 LC and ended up keeping the original part here as it was in decent shape. Comes with some of the mounting donuts. $40.
New Bosch front brake discs + pads + rear pads. $120 for all.
Sold the LC before I could install the...