Defective touchscreens remain a core problem.
A technical issue that dates back to 2012 continues to haunt Tesla and now the US government is getting involved. Last November, the California-based automaker acknowledged there are serious technical issues involving the Media Control Unit (MCU) touchscreen on the 2012 to 2015 Tesla Model S and Model X. In, short a number of touchscreens began to fail, rendering vehicles almost completely useless. Without working screens, drivers cannot control a variety of basic functions.
Complicating matters further for owners was that Tesla claimed the issue wasn't covered under warranty. Because of the increasing blowback, Tesla changed course and issued extended warranties for the older MCU unit but refused to issue a recall. US safety regulators believe it should.