Every model plotted by how often it fails its MOT at age seven against how far it has typically travelled by then, coloured by body type. The big, pricier cars tend to sit low on failure despite the extra miles; superminis and city cars ride higher up.
First-time MOT failure at age 7, one dot per model, coloured by body type. Read it as tendencies, not a league table: segments differ in typical mileage and age profile, so a supermini and an SUV are not being asked the same question. A dot's colour and its tooltip name the model and its class; hover or tap any point for the figures.