Jaguar started a huge push to improve their reliability in the 90-00s and were largely successful, given their JD Power ranking. Land Rover have always been lackluster in this regard but are making positve change. Nobody can afford to make unreliable cars, apart from niche OEM such as Ferrari.

In the UK, a freedom of information request revealed the most successful car of all time in annual roadworthiness test (MOT) is the humble Toyota Corolla. I bought a well maintained one on the basis of this report. It had 80k on the clock. The doors clanged when I shut them. It developed a mysterious water leak that would fill the footwell when it rained. It consumed alarming quantities of oil between services. At 100k the piston rings failed and the car was beyond economic repair. Searching the internet for clues I found many Corrolas that met the same fate and a cottage industry sprang up to marry good chassis with refurbished engines. Even the mighty Toyota gets it wrong sometimes.