Originally Posted by sisspc
My wife's '07 328 was noticeably ticking when I bought it. Soon after purchasing I changed the oil with German Castrol (don't know what previous owner used) and no shi+, ticking is completely gone. I'm not claiming it will solve everybody's ticking, but it worked on mine.
Same thing happened to my 2007 335xi... turned out it was my turbo waste gate actuator... not serious and doesnt NEED to be replace but i had it worked on anyways... total bill ~$2000