If anyone is having inconsistent connectivity with wired CarPlay, after doing some research this seems to be common with CarPlay. In Settings > TouchID and passcode (or faceID and passcode) you need to make sure USB accessories is turned on at the bottom.
I drove 700 miles round trip this...
It's been pretty solid so far for me. Wireless carplay got annoying since both my wife and I drive our GX, but I installed a USB port in the cigarette lighter connected to the carplay USB port, so we just use wired carplay.
Sometimes the screen won't respond or the unit appears to disconnect...
When I contacted Grom through their website: Support and Questions, an email ticket was automatically opened after sending a message through this page. Did you take the same steps?
I installed mine on my 2007 yesterday. Everything works well. I also installed 2 USB ports where the cigarette lighter is located, one of which connects to CarPlay which is nice. With this setup, I can just store a phone in the storage I installed where AHC used to be.
The unit really cleans up...
I bought a GX with 60k, and no record of timing belt service on the carfax even though the previous owner seemed to do most maintenance at timing intervals rather than mileage intervals since it appeared to be a second car for most of it's life. It was on a lift at the Lexus dealer when I bought...