On the Model S and X, the MCU main computing unit, in late February 2018 production was upgraded to a newer design “MCU2” switching from an Nvidia quad-core CPU to one based on the Intel Gordon Peak board, similar to that used in the Model 3. The Bluetooth and WiFi were also upgraded.
New features include a number of games and the ability to watch NetFlix and YouTube videos while parked. The touch response and display updates are also faster and it offers 5 GHz WiFi. The Bluetooth changes may allow fobless operation someday using your cell phone, similar to the Model 3.
Due to a new wiring harness and new Bluetooth and WiFi antennas, the MCU2 is not a drop-in replacement for cars with MCU1, but Tesla now has a retrofit option for HW2.0 and HW2.5 cars. Older cars cannot be upgraded. More details are available on the Tesla Infotainment Upgrade page.
One issue for some owners is the upgrade will remove access to the AM/FM/XM radio. We explain this and what your options are here.
The official statement from Tesla in early March 2018: “In the interest of full transparency, will not be implementing these retrofits in vehicles that have already been built and delivered.”
More recently, Elon stated you can upgrade the hardware:
The MCU1 to MCU2 upgrades are now available, at a cost of $2500.
Run our MCU1/MCU2 Tester to detect which MCU you currently have. Run within your Tesla browser by typing: teslatap.com/mcu