The engine temperature sensor wire for the engine temperature gauge, or warning light, may touch the rear exhaust manifold causing a short to ground causing erratic operation of the temperature gauge or warning light.
Problems for specific Buick Regal years:
Car problem reports
Problem with your car? See what our experts say or submit your own.
Most reported 1990 Buick Regal problems
The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)
The ABS master cylinder assembly may fail internally causing the ABS light to illuminate.