The Mini Cooper has to be the crappiest car of the last twenty years. When comparing durability, cost of repair, warranty, and original cost, it is an epic fail of a car.
Th e Powertrain Warranty - 4 years 80,000 kms. Pathetic.
The Cost of replacements - Engine $9,000, Tranny $9,500
Defects effecting durability - Engine failure at 40,000 kms, transmission failure at 100,000 kms.
The car is half quality and half shit. And the shit half is mega expensive to repair. For example the Oil Turbo line is not shielded from turbo heat, it cost $90 for the hose and $800 in labor. To change the water pump you have to take off the front of the car.
In summary don't but a Cooper S or any mini.
Below is an image of the thermostat housing. Nine hoses and two electrical connections.
French Engineering at it's finest.