"How reliable is the 2003 Pontiac Grand Prix?"

"Based on 136 NHTSA complaints, the 2003 Pontiac Grand Prix has a median complaint mileage of 100000 miles. The most common issue is ENGINE."

"What are common problems with the 2003 Pontiac Grand Prix?"

"The most frequently reported component in NHTSA complaints for the 2003 Pontiac Grand Prix is ENGINE, accounting for a significant portion of the 136 total complaints filed."

2003 Pontiac Grand Prix: Reliability Data

Source: NHTSA — 136 complaints

136

Total Complaints

100,000mi

Median Mileage

ENGINE

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

50,810 25th Percentile

100,000 Median Mileage

137,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE

ELECTRICAL SYSTEM

ENGINE AND ENGINE COOLING

ENGINE AND ENGINE COOLING:ENGINE

EXTERIOR LIGHTING

TIRES

STRUCTURE

SERVICE BRAKES

ELECTRICAL SYSTEM:IGNITION

FUEL SYSTEM, GASOLINE

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE CONSUMER WAS CONCERNED WITH THE SAFETY OF THE REAR DOORS OF THE VEHICLE. THE REAR DOORS DO NOT HAVE CHILD SAFETY LOCKS. *NLM"

"DURING WET WEATHER THE BRAKES ON A 2003 PONTIAC GRAND PRIX REFUSED TO ENGAGE. THEY MADE HIGH PITCHED SQUEALING NOISES AND THE WHEELS LOCKED UP. CONTROL OVER THE STEERING WHEEL WAS NONEXISTENT. *NLM"

"WARPED BRAKE ROTORS ON A NEW 2003 PONTIAC GRAND PRIX WITH ONLY 500 MILES ON IT. DEALER RESURFACED ALL 4 ROTORS INSTEAD OF REPLACING THEM WITH NEW ONES AUTO HAS LOST 35% OF ITS BRAKING POWER DUE TO ROTORS BEING CUT DOWN, CAR IS HARD TO STOP AND GM WILL NOT REPLACE THEM UNDER WARRANTY. *JB"

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

ENGINE 30 complaints

25th: 119,500 mi Median: 156,000 mi 75th: 180,500 mi

ELECTRICAL SYSTEM 14 complaints

25th: 94,390 mi Median: 118,492 mi 75th: 129,000 mi

ENGINE AND ENGINE COOLING 8 complaints

25th: 69,958 mi Median: 95,421 mi 75th: 100,050 mi

ENGINE AND ENGINE COOLING:ENGINE 5 complaints

25th: 1,577 mi Median: 33,435 mi 75th: 67,500 mi

Where Are Complaints Coming From?

Top states by complaint count.

MI: 15 IL: 14 GA: 12 OH: 8 WI: 7 TN: 7 VA: 6 IA: 6 IN: 6 MO: 5

Who Files Complaints?

14%

Original Owners

86%

Second+ Owners

Pontiac Grand Prix — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1990	249	89,993	SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER	17
1991	242	128,000	SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER	13
1992	158	130,000	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	10
1993	185	115,000	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	19
1994	306	125,000	VISIBILITY:WINDSHIELD WIPER/WASHER	33
1995	245	110,189	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	26
1996	116	39,153	ENGINE AND ENGINE COOLING:ENGINE:GASOLINE	10
1997	1064	100,500	EXTERIOR LIGHTING:HEADLIGHTS	52
1998	617	95,000	EXTERIOR LIGHTING:HEADLIGHTS	25
1999	500	95,809	ENGINE AND ENGINE COOLING	18
2000	588	92,000	ENGINE	13
2001	427	96,000	ENGINE	24
2002	410	90,721	ENGINE	28
2004	624	83,000	ENGINE	78
2005	209	71,290	ELECTRICAL SYSTEM	17
2006	365	98,800	ELECTRICAL SYSTEM	33
2007	323	93,500	EXTERIOR LIGHTING	23
2008	199	88,000	ELECTRICAL SYSTEM	14

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28