I have a 2014 250 f sport. The navigation unit keeps restarting. Lexus is charging me 11k to fix it. There is no way I'm dropping 11k on a navigation unit. They said the restarting was caused by liquid spilled on the center console so the mousepad isnt working also. Does anyone know of an aftermarket unit that will work with it? My last option will be to trade it in but I dont want to do that. It seems like alot of IS250 owners are experiencing the same issue. Please someone help

 

Welcome to the forum.

It's unfortunate your first post had to be about a radio unit failure.
I'm not sure where the dealer came up with $11K...of course I'm not sure what currency that is.
A radio head unit from the dealer is around $2,000 USD I believe...this is a common issue for 2014 model.

There are no aftermarket units that can replace it. The unit is basically the brains for the audio and navigation.
Your best option is to locate a used unit and replace it.
There is a faceplate ID number on the front of the unit at the bottom left...it will start with a letter "P".
Find that number and then Google to see if anyone is selling a used unit.