An engine oil leak may develop from the rear of the engine. This is commonly caused by a failed oil pump drive o-ring seal. The leaking o-ring should be replaced to correct this concern.
Problems for specific Buick Regal years:
Car problem reports
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Most reported Buick Regal problems
The front struts may show signs of wear, or be excessively bouncy ride at freeway speeds. This may begin to occur at around 75,000 miles.
When engine is warm and coming to a stop and foot of the pedal and braking the engine stalls ... no hissing sounds on brake booster. Car will not stall if i down shift to third or second on auto transmission.
Engine stalls when the turn signals are used. This happened at highway speeds and can be very dangerous. Also, the dash lights flashed on and off. Engine will restart but will stall again when you use the turn signals.
The power window motors and switches are prone to failure.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)
Illumination of the Check Engine Light may be the result of a loose or worn gas cap.
Wiring harness at right trunk hinge bends when trunk opened.
Wiring gets stressed and eventually breaks.
The orange wire in the bundle is the trunk light wire.
Failing that change bulb:
P/N is BP917