A/C not working -evaporator core leak

I totally agree this is known problem by BMW. The evaporator core that BMW replace must be paper thin because if I have a 2006 760li and the evaporator core went bad and was changed 11/2009 at 22,453 miles and then the problem occurs again and the evaporator core was changed again on 12/2013 by BMW at oly 38,186 miles. A car with extremely low mileage yet evaporator core has been changed by BMW twice within 4 years. I guess it would safe for me to assume that in another 4 years I'll be due for another replacement of the evaporator core again. For the costs of these cars and maintenance BMW needs to do better and all BMWS should be warranteed for 100,000 miles no exceptions. Even it your problem is covered under warranty and fixed it is still possible you would run into the same problem again out of warranty regardless. You may want to consider getting rid of the vehicle and the new BMW's are no better, I tried that route also and having problems with a 2013 bmw already. I don't consider them to be reliable vehicles after my 3rd bmw with major costly problems with low mileage. I hate to say but sometimes I just wonder if my vehicles are being sabotaged by BMW dealership when you are close to and a little of the 50,000 miles warranty. It's just my opinion and bad experiences with 3 bmw's that makes me wonder.