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Bookmark or Share- Legacy Model S with MCU v1 Software/Firmware Version ThreadSo a little update after driving several days. It does seem like FSD is behaving differently, perhaps it is running the newer 12.5.4.2 version even though the software screen says 12.3.6.
- Wiki - FAQ: MCU2 Upgrades | Tesla Motors ClubThe MCU is responsible for the main display, all external communications, audio, cellular, navigation, and settings. It has little to do with Autopilot, other than selecting various settings. There are two versions of the MCU in the S/X:
- Pros and Cons of MCU 2 Upgrade? | Tesla Motors ClubI wouldn’t say “MCU is so old it no longer gets software updates or new features” is a “pro”, even if some people don’t like the look/feel of the new features and updates. I certainly preferred the v10 UI to v11.
- AP1 MCU2 Upgrade? | Tesla Motors ClubThe MCU2 requires a new IC display - but if you ask Tesla will tell you the old MCU will cost ~$1100 for you to keep, so their "policy" of a new display when they could easily swap the old MCU1 display on to the MCU2 is a bonus with real value to me.
- My experience upgrading to MCU2 | Tesla Motors ClubJust a post to give my experience upgrading from MCU1 to MCU2. My car prior to upgrade: 2017 Refresh Model S, MCU1, AP2.5, Sunroof, Sirius XM, AM/FM, LTE, FUSC, WiFi 2.4GHz, Free Premium Connectivity, EMMC Recall active, Autopilot (not FSD) My car Post Upgrade: Still 2017 Refresh Model S...
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