I just checked for this bulletin about the e90 AC (I'm a BMW tech) and there is NO bulletin which leads to replacement of the entire A/C system. the two relevant bulletins refer to the following: A/C doesn't blow cold: Expansion valve faulty, must be replaced, possibly along with dryer (please don't ask me to explain all the parts, go to www.howstuffworks.com and check out Air Conditioning) A/C stops blowing cold on long drives (1 hour plus) caused by bad temp sensor in the evaporator, causing evap to ice over, stopping cold air flow. Replace sensor and adjust some wiring. NO bulletin about replacing the whole a/c. there may have been something specifically wrong with yours, and they were led to replace the whole thing, but not by bulletin. Pe langa asta cred ca ar trebui sa duci masina la reprezentanta . Cel mult platesti un tester si poate afli cauza Citeste si aici poate gasesti printre probleme si asta http://www.e90post.com/forums/showthread.php?t=1462 Si studiaza E90 post bine am vazut ca sunt cateva probleme cu Ac