I had the engine replaced by BMW in my 94 840Ci last May. The warranty expired on May 20 and I had the engine checked on May 19. Anyway I have heard some rumblings about a class action law suit if BMW does not stand behind these engines. The six year period just started to expire this year. I think a lot depends on how good a customer you are viewed to be. I also have a 95 740iL in which the six years are up in Oct 2001. I'll have it checked sometime before the warranty expires.