Hi everyone First I am new to the club so I am going to apollogize in advance if I start asking about BMW slang terms. I just recently bought a 2001 540i and was on my way home to Kennesaw, GA and when I went to pass a car I heard a boom from at the time I thought was from the bottom of the car. After passing the car in front of me I check in my rearview mirror and noticed some what I thought was white smoke coming from my car at first I thought maybe it was something I had hit and it was some form of powder but I also noticed that it wasn't going away so I pulled over to check it out. I first went to the bsck of my car and looked under the car and noticed that I had fluids coming from the front. I popped the hood and noticed that that my radiator fan was missing thinking that the fan belt must have gave out and took the fan and a radiator hose with it. I had the car towed back to my house I when the tow truck set my car down popped the hood again so I could take a better look at what happened since I had better light and to my surprise my belt was still intacted and the fan put some dents in my hood when it exploded and it looks like it pulled a radiator hose from the engine. I was wondering if anybody has had this problem or a problem like it in the past? I personally had never even heard of a fan doing anything like this neither has my father and he has been working on cars since he was in high school.