We had this happen on our 2015 Electric Pasion Cabrio, we were under three years and the dealer covered it under warranty.Flooded battery box 0842 passion convertible CarMax refusing to fix after purchasing the best warranty they offer any suggestions?
Looking back, we did have a heavy rainstorm, and we did park it under the lip of the garage so the charge cable reached it. I think this caused the infiltration to the point that the (stupid) battery box under the passenger floor filled up with water.
That said, a leak in the convertible roof should not happen, even parked in a large rain event, it did.
We vacuumed out the water, but had errors like "Brake Malfunction" so we had it towed.