After 120,000km on the original set of pads (2016 Model X) I am starting to wonder how long they actually last. I know brake pad life depends on how you drive, but as someone who replaces the pads on other cars quite regularly and drives the X pretty hard, it is a continual source of amazement that the original pads are still going. Its too much effort to take a wheel off to check, I was just interested in what km range others have replaced pads in their X.