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MCU Tester


In the Model S and X, Tesla uses two different MCUs (Main Computer Unit). This test checks which hardware is in your vehicle when run from the vehicle’s browser.

Test Results
Expected Values
MCU1Linux armv7l1200×1920Mozilla/5.0 (X11; Linux) Apple WebKit/534.34 (KHTML, like Gecko) QtCarBrowser Safari/534.34 [Old browser]
MCU1Linux armv7l1200×1920Mozilla/5.0 (X11; GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Tesla QtCarBrowser Safari/601.1 [New browser]
MCU2Linux x86_641200×1920Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1
MCU2Linux x86_641200×1920Mozilla/5.0 (X11; GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Tesla QtCarBrowser Safari/601.1
  • Platform indicates the MCU processor, the Nvidia Tegra 3 (arm) in MCU1, and Intel Atom E8000 series CPU (x86_64) in MCU2. MCU2 started shipping in all Tesla S/X manufactured at the start of March 2018.
  • UserAgent relates to the hardware and browser software in use. The browser was upgraded in version 2018.14 for MCU1. Expected values were collected in April 2018
  • This utility has not been tested with the Model 3 yet and the display value may not be accurate.
What’s New in MCU2
  • Faster CPU, results in snapper operation
  • WiFi Support for 5 GHz band
  • External Bluetooth Antenna (perhaps for future feature – using a phone as a key like M3)