I changed my power steering fluid when i noticed its change in appearance. The mechanic drained the old one and i put the mobil atf.intially the steering was stiff as time passes it gets better but now i noticed a humming sound arond the serpentine belt driving tne power steering pump, alternator and the a/c. The engine light comes on when this humming sound comes on sometimes is less noisy and the check goes off. I ve gone tru the car manual the fluid for the power steering fluid is not specified there in. Pls, has anyone had this experience before or any one knows the appropriate power steering fluid for this car model.the car runs fine but presently the check came up this a.m again, pls i need ur help house.

I have a 2007 mazda 6 too. Check your user's manual very well, it's written there on the maintenance specification page. The specified ATF is mazda ATF M-V or dextron 3 if the former is not available. Why not consult your mechanic again to see if the cause is as a result of the ATF change?

what atf did you put?.....also did the mechanic bleed off all the air in the system?....if not you could possibly be looking at a rack n pinion seal failure.....