One problem related to brake disc caliper has been reported for the 1999 Buick Regal. The most recently reported issues are listed below.
Severely rusted rear brake rotors resulting in caliper pins seizing and premature wearing of brake pads on rear wheel brakes. Vehicle is 6 years old with only 46,500 miles. Required to replace brake rotors, hardware and pads. Vehicle still has original pads and rotors on the front brakes.