215 - 219 is about the normal operating temperature for the 2nd generation R55 - R60 models. I wouldn't worry too much if you occasionally see 223. As long as the temps stay in that range or close when driving around town, your MINI should be fine. 

These cars are set to run at what we would consider 'hot' since the hotter they run, the cleaner the exhaust.

Hey you guys, my name is Jonathan from Ontario Canada and I just purchased a 2011 Mini Cooper JCW. Not even a week into owning it the auxiliary water pump went for the turbo and coolant went everywhere. I fixed the issue but I’ve been having coolant issues ever since I’ve tried to fill and bleed the coolant system. I followed the online procedures but when driving I noticed via obd2 scanner that the coolant temps were between 218F-223F with outside temps being 32C/ 90F. I wasn’t sure if this is normal. I’m going to be doing a 5 hour road trip with the car and I don’t want air to be In the system. I did make the mistake after buying it to not get the initial temps for the coolant but no one is perfect. My question to the community is if I should be worried. The coolant is high but I’ve been told that coolant between 210F-215F is considered “normal”. If anyone has had any experience with this I would Honestly highly appreciate it. I want to meet the community and exited for the new culture with this car. Any help at all would mean the world. Thanks