I wouldnt know which generation sorry but I do have a mid-2007 MCS if that helps.

 

I am convinced its a boost leak because im getting P1152 O2 Sensor Heater Circuit Low Voltage (Bank 2 Sensor 1)mostly and when I clear that code my engine starts misfiring. When I reset the battery and start the car, it runs fine again but with the 1152 sensor, same thing happens then I clear it (engine missfire) Is there anything you can spray on tubes to check for leaks such as carb cleaner? This week has been a nightmare for me and my MINI =(