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I'd suggest to stay away from the 23kwh battery or the 2012 to 2016 model years. It seems that the older battery expands and causes the coolant leak. Honestly, i don't know if the chemistry of the 33kwh is immune or just needs more time to fail... But it seems to be accepted that the older battery has the potential to fail. I don't think it is preventable, but not everyone has the issue although more and more are popping up. There are ways to detect it, but once it happens, the only fix that had been tried is drying out the internals of the battery and bypassing the coolant. One user used Flex seal to repair, but i haven't seen the repair of that.Anyway, I'm sure other have more to add, but those are my thoughts.
I'd suggest to stay away from the 23kwh battery or the 2012 to 2016 model years. It seems that the older battery expands and causes the coolant leak. Honestly, i don't know if the chemistry of the 33kwh is immune or just needs more time to fail... But it seems to be accepted that the older battery has the potential to fail. I don't think it is preventable, but not everyone has the issue although more and more are popping up. There are ways to detect it, but once it happens, the only fix that had been tried is drying out the internals of the battery and bypassing the coolant. One user used Flex seal to repair, but i haven't seen the repair of that.
Anyway, I'm sure other have more to add, but those are my thoughts.
