For more information about what happens when the eMMC chip dies, see: Consolidated eMMC Thread (MCU repair) My story was that last summer (September 2019) the eMMC chip of my Model S from 2013 failed. It has 260.000km on the ODO and the chip failed before I was able to replace it. I did put on a new chip (64GB Swissbit), but I lost my (Open)VPN certificates. Through the Service Centers I tried to get Tesla to perform a re-install of my car, but they refused. I wrote to their European HQ a couple of times, they refused. The only thing they would do is replace my MCU and only charge for the parts. As I refused to pay the ~EUR 2000 for a new MCU I send my failed eMMC chip to Poland: Multi-Com.eu » Cell Phone Service, Repair, Unlock - Software, Tools, Devices In my own equipment this chip wouldn't respond anymore, but these guys did an amazing job! At first they said: The chip is toast. Then they came up with a solution: Rrder exactly the same chip and by reading the NAND memory directly using ECC corrections using the new donor chip they might have a shot at it. My chip needed to be cooled to -28C while they were reading data from it. Reading was slow; super, super slow. It took 8 weeks to get the bits of the chip and to restructure the data. But they did it! This morning I received the files I needed: - car.crt - car.key - ta.key They charged me a flat-fee of EUR 250 for this service. They say it took them way to much time to make a profit on it, so I paid them something in addition. It was still way cheaper then replacing the whole MCU. So should you be in the same boat as I was: Use these guys from Poland!