One problem related to brake abs warning light has been reported for the 2001 BMW 325. The most recently reported issues are listed below.
While traveling down the interstate at approximately 75 mph with the cruise control on, the car suddenly veered left and the abs engaged and slowed the car suddenly to about 40 mph. My immediate thought was that I had blown a tire, but then recognized the abs was causing the car to judder. The dsc and abs lights illuminated and remained on. The mil light did not illuminate. I took the car to a repair shop that diagnosed a faulty rotational rate sensor (yaw). The system recognized that it received erroneous data, but I believe failed in an unsafe manner. I purchased this car for my soon to be 16 year old daughter and cringe to think how she would've reacted to this situation. This failure put the car in the precise situation where you would want the dsc to be working.