1991 Pontiac Grand Prix: Reliability Data

Source: NHTSA — 242 complaints
242
Total Complaints
128,000mi
Median Mileage
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
Top Issue
13
Crash Reports

When Do Complaints Happen?

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

35,250 25th Percentile
128,000 Median Mileage
146,535 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
22
STRUCTURE
16
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC
13
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
13
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM
13
STRUCTURE:FRAME AND MEMBERS
11
ENGINE AND ENGINE COOLING:ENGINE
10
UNKNOWN OR OTHER
8
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS
8
EXTERIOR LIGHTING:BRAKE LIGHTS
7

Severity Assessment

13
Crashes
5
Fires
11
Injuries
0
Deaths

Sample Complaint Reports

"REAR DISC BRAKES PADS FELL COMPLETELY OFF; CALIPER SLIDE PINS WERE FROZEN ON BOTH WHEELS; BONDING DID NOT HOLD BRAKES PADS TO METAL RETAINER; LOSS OF BRAKING."
"REAR DISC BRAKES PADS FELL COMPLETELY OFF; CALIPER SLIDE PINS WERE FROZEN ON BOTH WHEELS; BONDING DID NOT HOLD BRAKES PADS TO METAL RETAINER; LOSS OF BRAKING."
"UNDER THE ENGINE FIRE, ELECTRICAL SHORT IGNITION CAUGHT ON FIRE. TT"

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

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