Tesla MCU2 — overview, specs, differences & faults

The system

MCU2 uses an Intel Atom (Apollo Lake) with 64 GB eMMC. It’s considerably faster; features like a modern browser, better Wi-Fi/BT and (with proper HW) Dashcam/Sentry become available.

Specifications (summary)

• CPU: Intel Atom (Apollo Lake)
• Storage: 64 GB eMMC
• Models: Model 3 from 2017; S/X from ~March 2018

Differences vs. previous generation

• Significantly faster than MCU1
• New visualisations and features (model dependent)
• Improved networking (incl. 5 GHz Wi-Fi)

Common faults & our solution

• Storage/aging: sporadic errors, boot loops. We check storage, power and thermals and repair accordingly.
• Modem/antenna: we trace dropouts down to component level.

Upgrades and retrofit

Retrofit MCU1 → MCU2 is often worthwhile. We validate compatibility and handle dealer-level coding/calibration.