Those motors will outlast the car.
As proof, the company shows off how the gears appear after testing. Elon Musk, in a separate tweet, adds that both motor and gearbox are in solid condition after 1 million miles.
"Designed for ultra high endurance."
What does that really means to us? Well, there is no need to worry much about drive systems in used cars and your drive system will last for the entire life of the car and probably even longer (for example, in other after-life projects like conversions). That's the beauty of electric machines and simple single-speed gearboxes.
Tesla Model 3 gears after over 1 million miles - still in good condition