One problem related to vehicle overheat has been reported for the 2009 Mini Cooper. The most recently reported issues are listed below.
At 89,044 miles my 2009 Mini Cooper, purchased from vista Mini suffered a catastrophic coolant loss due to a cracked thermostat housing, and as a direct result the vehicle severely overheated irreparably damaging the engine. I was driving along the turnpike at highway speeds when the warning indicator light for the engine temperature came on, and before I could safely pull the vehicle over the vehicle rapidly slowed to a veritable crawl (allowing me just enough time to get it off the road). The vehicle was ultimately towed to a Mini dealer for inspection, but they determined that it would need to have the entire engine replaced. Which would be a rather costly repair, requiring an outlay of funds far greater than the vehicle's value. Thereby substantially decreasing the likelihood of completing the required repairs. I purchased the vehicle believing it to be a quality product, and one capable of being driven for many years to come. However, the experience I suffered severely shook my confidence in the product, so I began to do my own research on the cause of the failure. It turns out that not only Mini engines, but also those manufactured by BMW, share a similar defect, in that they both are prone to the thermostat housings cracking and causing rapid coolant loss. Couple that with the well documented criticism of the location of the coolant sensor in the engine, and you have created the perfect nucleus for generating a cataclysmic meltdown of the engine that lies secretly hibernating within the product line. Therefore, I do not feel that it is fair for me to have to bear the burdensome cost of repair for a problem that is endemic to the product line as a whole.