Problems · NHTSA complaints

2003 Buick Regal problems

Owners filed 104 complaints about the 2003 Buick Regal with NHTSA between Nov 2002 and Aug 2023. The most-cited component is electrical system (36).

Complaints
104
Filed with NHTSA
Crashes
5
Reported by owners
Fires
14
Reported by owners
Injuries
7
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system36
  2. Engine26
  3. Engine and engine cooling12
  4. Steering10
  5. Service brakes7
  6. Power train7
  7. Wheels6
  8. Exterior lighting5
  9. Visibility4
  10. Service brakes, hydraulic4
  11. Air bags3
  12. Fuel/propulsion system2
  13. Seats2
  14. Vehicle speed control2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20021
20033
20043
20054
20061
20078
20084
20095
20102
20115
20122
20131
201423
20159
201622
20175
20184
20190
20201
20210
20220
20231

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

36 reports2 fires
“UNANNOUNCED TO PURCHASERS, THE BUICK REGAL HAS A REDUNDANT AND DEFECTIVE SECURITY IGNITION SYSTEM THAT PREVENTS THE VEHICLE FROM BEING ABLE TO START WITH THE KEY AFTER THE BATTERY IS DISCONNECTED. IT MUST NOW BE TAKEN TO A DEALERSHIP TO BE DIAGNOSED AND FOR A COSTLY REPAIR. IT WAS STATIONARY, AND THE BATTERY DRAINED DOWN WITH A PHONE CHARGER HOOKED UP. EVEN FOLLOWING THE FACTORY KEY SEQUENCE, THE BATTERY RUNS DOWN BEFORE THE CODE CAN BE CLEARED AND RE-ESTABLISHED.”
Owner complaint to NHTSAFiled Feb 3, 2017Electrical systemODI 10949491

Engine

26 reports1 crash10 fires
“I BACKED THE CAR IN DRIVE AND THE GUAGES WERE NORMAL. WHEN I GOT OUT I SAW A SMALL AMOUNT OF SMOKE COMING FROM UNDER CAR BUT WITHIN A MINUTE THERE WERE FLAMES COMING FROM UNDER THE CAR AND WITHIN A FEW MINUTES THE FLAMES WERE ABOVE THE CAR. I CALLED 911 WHEN I SAW FLAMES AND KNEW I WASN'T GOING TO BE ABLE TO PUT THE FIRE OUT MYSELF. THE FIRE DEPT ARRIVED, IT TOOK THEM AT LEAST 30 MINUTES TO PUT THE FIRE OUT. A COUNTY DEPUTY ARRIVED AND THERE IS A POLICE REPORT (I TRIED TO UPLOAD IT AND IT FAILED EACH TIME). THE DAMAGE HAS BEEN INSPECTED BY AN INSURANCE REPRESENTATIVE FROM THE OWNER OF THE HOUSE (UPLOAD FAILED.”
Owner complaint to NHTSAFiled Aug 4, 2023Unknown or other, Engine, Fuel/propulsion systemFire reportedODI 11536533

Engine and engine cooling

12 reports2 fires3 related recalls
“TL* THE CONTACT OWNS A 2003 BUICK REGAL. THE CONTACT STATED THAT THERE WAS A PRESENCE OF AN OIL LEAK WHICH PROGRESSED WITHOUT WARNING. THE CONTACT NOTICED A PUDDLE UNDER THE VEHICLE. THE CONTACT LATER RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 15V701000 (ENGINE AND ENGINE COOLING). THE DEALER WAS UNABLE TO SUPPLY THE PART FOR SEVERAL MONTHS. THE CONTACT WAS UNABLE TO DETERMINE WHEN THE MANUFACTURER WOULD BE ABLE TO SUPPLY THE PART TO THE DEALER. THE FAILURE MILEAGE WAS NOT AVAILABLE. VIN TOOL CONFIRMS PARTS NOT AVAILABLE. UPDATED 05/11/16*LJ *TR”
Owner complaint to NHTSAFiled Mar 10, 2016Engine and engine cooling, EngineODI 10846003

Steering

10 reports2 related recalls
“MY 03 BUICK REGAL LS WILL SHUTOFF SOMETIMES WHEN TURNING LEFT, OR WHEN USING THE TURN SIGNAL. I CAN NOT FIND THE PAPERWORK, BUT I REMEMBER A RECALL FOR THIS ABOUT 5 TO 8 YEARS AGO. WE DID HAVE IT ADDRESSED, BUT THE PROBLEM HAS COME BACK. TODAY'S DATE IS 1/9/17 AND MY WIFE HAD THIS HAPPEN AGAIN TO HER ON 1/4/17 WHILE MAKING A LEFT HAND CURVE. SHE WAS NOT TURNING OR USING HER TURN SIGNAL. I ONLY HAD IT HAPPEN TO ME ONCE WHILE MAKING A LEFT TURN USING MY TURN SIGNAL. MY MOTHER ALSO HAS AN 03 REGAL GS AND ALSO EXPERIENCED THIS SAME PROBLEM. I CONTACTED THE DEALER WHERE I PURCHASED THE CAR AND THEY TOLD ME THERE IS NO CURRENT RECALL NOR WAS THERE EVER ONE FOR THIS PROBLEM, BUT I KNOW WE HAD IT ADDRESSED ABOUT 5 TO 8 YEARS AGO.”
Owner complaint to NHTSAFiled Jan 9, 2017Steering, Electrical systemODI 10943795

Service brakes

7 reports1 crash
“TL* THE CONTACT OWNED A 2003 BUICK REGAL. WHILE DRIVING 5 MPH, THE BRAKES MALFUNCTIONED AND ANOTHER VEHICLE STRUCK THE PASSENGER SIDE OF THE CONTACT'S VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED INJURIES TO THE BACK, THE ENTIRE RIGHT SIDE OF THE BODY, THE FOOT, AND THE NECK. MEDICAL ATTENTION WAS REQUIRED. THE VEHICLE WAS TOWED TO A DEALER. THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE AND VIN WERE UNKNOWN. UPDATED 11/29/16*LJ UPDATED 12/13/16.*JB”
Owner complaint to NHTSAFiled Sep 12, 2016Air bags, Service brakesCrash reportedODI 10905903

Power train

7 reports1 crash
“TL* THE CONTACT OWNS A 2003 BUICK REGAL. WHILE DRIVING 20 MPH, THE VEHICLE ACCELERATED INDEPENDENTLY WHEN THE ACCELERATOR PEDAL WAS NOT DEPRESSED. THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE POWER TRAIN CONTROL MODULE FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 82,000.”
Owner complaint to NHTSAFiled Jun 7, 2016Power trainODI 10872999
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.