Originally Posted by The1
power steering whine is very normal, that being said, if you're making it wine, you're being hard on it.
turn your steering all the way till it stops, then back off a quarter turn so it doesn't do that. it's not exactly nice on the systems to crank them full stop.
on that subject, i'd also like to add that flushing your power steering fluid around 30-40k miles is HIGHLY recommended. bmw won't pay for it, since they call the power steering fluid a "lifetime fill." BUT, i was appalled at how disgusting the fluid was on my car after around 40k miles.