Originally Posted by samchoi604
Nothing is lifetime. BMW did not magically defy physics with their coolant. Same goes for their transmission and differential oil. They all need to be changed eventually if you want to keep your car for a long time.
I agree but that is what is stated on the owners manual. I contacted BMW USA about this, asking them how they defined the term "lifetime" and they didn't answer my question but asked me to contact the dealership. I asked the service manager at one of the local dealerships and he mentioned that BMW considers approximately 100,000 miles to be lifetime although he wouldn't put it in writing!