[plisken]

I have an '01 DTS with repetitive rotor issues. About 15k miles ago I replaced the front rotors and pads. However, I did not take it to my caddy dealership and I didn't use the OEM parts. I used Brembo as I figured that the OEM parts had a defect seeing that I had previously machined my rotors 3 times. This lasted for about 7K miles and the "pulsating" came back. I took it to my caddy dealership and they "machined" the front and the rear rotors. Well, here we are about 8k miles later and the pulsating came back. This time it was only really noticeable when I hit the brakes at high speeds. Lower speeds were barely affected. I took it to an auto shop down the street and the mechanic stated that the front and rear rotors were in "bad" shape and asked If I had ever had them replaced. I then thought to myself, "What in the world is eating away at these things"? I told him that I had replaced the front rotors and pads about 15k miles ago and that this was the 2nd time in to have them machined since replacement. He kind of looked at me and said, "Well, I see this happen to Ford's all the time." I had a 2000 BMW 528 and put 54K miles on the vehicle without having to replace or machine the rotors. I seem to be only getting about 7K of mileage out of them and the issue returns. BTW, I put about 15-18K miles per year on my DTS. Please, any advice or recommendations would be greatly appreciated.