2003 Chevrolet Impala: Reliability Data

Source: NHTSA — 935 complaints
935
Total Complaints
88,000mi
Median Mileage
ELECTRICAL SYSTEM
Top Issue
44
Crash Reports

When Do Complaints Happen?

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

50,000 25th Percentile
88,000 Median Mileage
129,057 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
231
ENGINE
88
EXTERIOR LIGHTING
57
ENGINE AND ENGINE COOLING
40
AIR BAGS
28
EXTERIOR LIGHTING:HEADLIGHTS
27
STEERING
25
UNKNOWN OR OTHER
23
SERVICE BRAKES, HYDRAULIC
21
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR
20

Severity Assessment

44
Crashes
45
Fires
35
Injuries
0
Deaths

Sample Complaint Reports

"CONSUMER STATES OF VEHICLE NOT HAVING A CHILD LOCK SYSTEM. MANUFACTURE HAS REMOVE THIS FROM THE VEHICLE. TS CONSUMER STATES WHEN SHE BROUGHT THE VEHICLE SHE THOUGHT THE CHILD SAFETY LOCK WAS A FEATURE. PH 09-DEC-2002"
"CONSUMER STATES ENGINE SHUTS OFF WHILE DRIVING AND PULLING OUT IN THE ROAD. CONSUMER FEELS THIS IS A SAFETY HAZARD. PH"
"WHEN ACCELERATING TO ENTER THE FREEWAY AT ABOUT 45+ MILES AN HOUR, THE CAR WOULD NOT STOP ACCELERATING. I TRIED TO PUT THE CAR IN NEUTRAL, DOWNSHIFT, AND APPLY THE BRAKES. I ALSO AT THE URGING OF 911 STAFF, APPLIED THE EMERGENCY BRAKES. THE CAR AFTER ROUGHLY 5 MILES OF CONTINUED ACCELERATION EVEN..."

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