I have a friend who bought a VW Toureg and his is always in the shop. What is dumb is assuming that one person's experience with their vehicle applies to all of the ones produced. If out of a 1000 Toureg owners there are 600 who have had problems with the engine or electrical system there will still be 400 who can say that they have never had a problem. Would anyone buy a car if they thought they had a 60% chance of problems that would require multiple trips to the car dealer or worry about breaking down on the highway while towing a trailer?
There are multiple owner surveys done by JD Powers and Consumer Reports and ones done of auto repair shops that are not difficult to find online and these provide information based on thousands of owners' experiences with thousands of cars.
For a tow vehicle reliability is at the very top of my list in choosing what to buy when comparing multiple cars or trucks.