No later than the Model S battery needs replacing - the Model X comes up with Drive Unit Needs Service (i.e. replacing). It is only three months old and driven by the wife who treats it like a baby. Tesla have ordered a replacement. Having a bad week In the big scheme of things - it is comparable to the issues we had with the BMW 5 Series and Land Rover Discovery that preceded them. The BMW spent 3 of its first 12 months at the BMW Service Center and the Discovery made me nervous every time we would get the service bill. Model S (2 years) - 3 door handles required replacing (all under warranty). Rim required replacing (not Tesla's fault). Battery requires replacing (under warranty). Model X (3 months) - 2 seats require replacing (delivered with small rips). Drive Unit requires replacing (under warranty.