One problem related to brake disc pads has been reported for the 1998 Buick Regal. The most recently reported issues are listed below.
Have 1998 Buick rega GS. Only 55000 miles. Have had several rotors and brake pads replaced over life of vehicle. Same problem even while under warrenty. Dealer originally turned rotors. Dealer appeared to be aware of problem. Problem returned shortly thereafter. After several rotors and brake pad replacements out of warrenty I finally replaced rotors with high performance cross drilled and slotted rotor (assuming a heat problem) but to no avail. Vehicle shakes violantly at times when brakes applied and rotors always warped. I believe gm was aware of problem from onset but refuses to recall vehicle. Please note that this vehicle did this from the day I purchased it new in decmeber of 1997 but I thought it was a new form of antilock braked that pulsated. Fear that if sold to another individual, vehicle brakes may fail.