On an EV, if anything happens to the motor or battery that they need work, you've done something so extraordinarily bad that you've somehow physically damaged them. Under normal use, they shouldn't need maintenance due to the much much less strain put on the motor without the constant explosions and multitude of fluids running through it. It's literally just a motor and a few electronics hooked up to a battery. There's nothing that special about it, and it's been proven to be a pretty reliable setup. Beyond that, they are a normal vehicle with normal replacement parts. Brakes, shocks, suspension bushings...all the same as every other vehicle out there.

You're worried about literally nothing...