His situation is unique since he drives a Taxi in Quebec. It is a very harsh environment there in the winter and the roads are horrendous and will wear out a 4x4. There are pot holes that will swallow a car. Hence the wheel bearings. Brakes in a Taxi are replaced very frequently. Where a typically driver might replace them once every 2-3 years a Taxi might replace them 2-3 times a year. The power train warranty (unlimited mileage) has covered his drive unit which I imagine is like a transmission and not the electric motors.