I have a 2002 BMW 525i with 100k miles. Since I bought it at 30,000 miles there has been a braking problem. If I am applying the brakes and hit a bump or rough pavement, the brakes start to “pulse”, they make a “rattley, clattering” kind of sound, and it feels as though they will fail to stop the car. Removing my foot from the brake for a breif moment then reapplying the brake past the bump or rough pavement stops this from happening. Most mechanics claim they can’t reproduce it, but I can. At about 50K miles I decided to self diagnos the problem as a bad sensor or “motor” for the antilocking system. I had it replaced which appeared to resolve the issue for a while. But it is now back.
Anyone have thoughts about what this may be?