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- Jan 23, 2020
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- 2013 Ford Fusion Energi, 2021 Mach-E First Edition
The issue some Tesla owners are seeing is is a flash wear issue. Apparently they didn't know what literally every embedded systems programmer outside of Tesla knows, which is that you need to either use flash with a levelling controller, or manually manage levelling - either way, you avoid "burning out" the flash during its lifetime. This is because flash memory cells have a limited number of read-write cycles, and that needs to be managed. If you have an SSD in your laptop, the same exact issue applies, but the controller manages that for you generally so that you never notice it, including remapping to a buffer. The major manufacturers (e. g. Micron/Crucial) expose this from the drive if you ask the drive for it.Well it seems that chips have an expiry date has some Tesla owners are now experiencing. Hopefully even if after some years you will not be able to receive anymore OTA updates (imagine in your head)that the computer chips that the car relies on will not fail like those on the MME. That was a surprise to me discovering that those chips could come to an end of life type of thing?
It's actually in some high level ways a lot like wear in EV batteries, although you can't take that analogy too far.
There's a lot of writeups about this particular issue around, for example: Flash Memory on Some Tesla Cars Is Reportedly Burning Out, Causing Major Issues (gizmodo.com)