Equal-exposure complaint evidence and changes in the reported problem mix

1990 vs 1991 CHEVROLET LUMINA

NHTSA Consumer Complaints complaints · snapshot 2026-08-21

Share shifts show how a vehicle's problem mix changed. They do not measure reliability, and complaint counts are not normalized for sales volume.

First 431 months on market for each model year

Exposure window calculated through Aug 22, 2026

Age-matched reports

▼ 18.1% fewer reports in the equal exposure window

1990 426 complaints 1991 349 complaints

NHTSA Consumer Complaints complaints · snapshot 2026-08-21

Component share shift

Bars start at the neutral midpoint. Left means a smaller share; right means a larger share.

View component share data as a table
Component 1990 share 1991 share Share change
STEERING 7.3% 4.3% ▼ 3.0 pts smaller share
POWER TRAIN 0.7% 2.6% ▲ 1.9 pts larger share
STRUCTURE 11.0% 12.9% ▲ 1.9 pts larger share
PARKING BRAKE 2.1% 0.6% ▼ 1.5 pts smaller share
TIRES 0.5% 2.0% ▲ 1.5 pts larger share
SERVICE BRAKES 47.9% 49.0% ▲ 1.1 pts larger share
EXTERIOR LIGHTING 1.2% 0.3% ▼ 0.9 pts smaller share
SUSPENSION 1.9% 1.2% ▼ 0.7 pts smaller share
FUEL SYSTEM 0.7% 1.2% ▲ 0.5 pts larger share
SEAT BELTS 5.9% 6.3% ▲ 0.4 pts larger share
ELECTRICAL SYSTEM 4.5% 4.9% ▲ 0.4 pts larger share
AIR BAGS not reported 0.3% ▲ 0.3 pts larger share
WHEELS 2.6% 2.9% ▲ 0.3 pts larger share
ENGINE 7.0% 7.2% ▲ 0.1 pts larger share
VISIBILITY 1.2% 1.2% ▼ 0.0 pts smaller share
VEHICLE SPEED CONTROL 1.2% 1.2% ▼ 0.0 pts smaller share
UNKNOWN OR OTHER 83.1% 81.4% ▼ 1.7 pts smaller share

NHTSA Safety Recalls recalls · snapshot 2026-08-22

Recall campaigns

1990 9

Campaign components: EXTERIOR LIGHTING

1991 6

Campaign components: FUEL SYSTEM, OTHER

NHTSA Consumer Complaints complaints · snapshot 2026-08-21

Safety signals

◆ Fires
8 → 9
◆ Injuries
16 → 13