He died of 'lung failure' apparently. I've always had a thing for Marlon Brando - he seemed such a dangerous man, sex on legs etc. Streetcar is my fave film, he's so young and lithe and sexy in it.
Did you know he and Jack Nicolson lived together for a while, fairly recently? JN's girlfriend threw him out and he didn't have anywhere else to go. Can you imagine the two of them living in the same house, lol!
Btw, Brando's autobiography is an excellent read.