But why? The post above about costs are about a business practice designed to control the repair process, presumably to maximize profit.
But repair and maintenance ought generally be expected to be cheaper and easier.
Mechanically they are much simpler.
Battery: Has a known and defined life. Replacement is still costly, but getting cheaper. This is the biggest potential cost by far, but should still outlast an ICE and be = or less costly to replace.
Motors: Generally expected to last MUCH longer than ICE and be cheaper and easier to replace by far.
Controls: Mostly electronic and centralized. A little more prone to colossal failures perhaps, but less failure prone in general, and easy to diagnose and repair with cheap generic components.
Components: Wheels, brakes, etc. are about the same as ICE. Brakes are a little more complicated than ICE, but overall fewer moving parts, joints, etc makes it a wash.
All in all, the experts predict lower repair and maintenance costs and that gap should widen as more and more EV hit the road.