Front brakes warped, steering wheel vibration upon braking
I'm having this issue with my 2008 550i since last July.
I went to my local dealer back in July 2011 to have to brakes looked at for squeeking and noise (no vibration). They ended up replacing the front pads.
Since then, after about a month or 2 of normal driving, a vibration in the steering wheel will be noticed upon braking from ~45-30 mph. Took it back to the dealer and they replace the rotors and pads. 2 month later again, same vibration. Took it back again and they checked for the hub to see if it's true and it was, so they replaced the rotor and pads again. ~2 months later, vibration is back.
My car is there now for the 3rd or 4th time and they said they cannot warranty my brakes because they see discoloration on the rotors as if it's been over heated. My driving is pretty normal (probably more on the conservative side if anything) and I do not track the car.
Has anyone encountered this situation? What can I do to convince them that this is BMW's responsibility?
2008 White/Cream 550i
Sports, Navigation, Comfort Access, Sports Automatic Transmission, Heated Front Seats, Logic7, Sirius Sat, USB/Ipod, Auto Rear Sunshade.
LED interior, license plate and side markers lights.
Black powercoated OEM wheels, matte black kidney grills, shadowline rear "550i" emblems.
Reus Audio System