"How reliable is the 1991 Isuzu Trooper?"

"Based on 71 NHTSA complaints, the 1991 Isuzu Trooper has a median complaint mileage of 0 miles. The most common issue is POWER TRAIN:AUTOMATIC TRANSMISSION."

"What are common problems with the 1991 Isuzu Trooper?"

"The most frequently reported component in NHTSA complaints for the 1991 Isuzu Trooper is POWER TRAIN:AUTOMATIC TRANSMISSION, accounting for a significant portion of the 71 total complaints filed."

1991 Isuzu Trooper: Reliability Data

Source: NHTSA — 71 complaints

Total Complaints

POWER TRAIN:AUTOMATIC TRANSMISSION

Top Issue

Crash Reports

What Fails?

Most reported component issues from NHTSA complaints.

POWER TRAIN:AUTOMATIC TRANSMISSION

WHEELS:LUGS/NUTS/BOLTS/STUDS

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

TIRES:TREAD/BELT

ENGINE AND ENGINE COOLING:ENGINE

VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

ELECTRICAL SYSTEM:WIRING

ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

SUSPENSION:FRONT

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"ALL 4 DOORS STICK AT TIMES DRIVERS SIDE DOOR LOST SPRING DRIVER SIDE REAR DOOR IS SEPARATED FROM THE FRAME. TT"

"TRANSMISSION LOCKUP UNDER LOADING CONDITION. EXPLAIN IN MORE DETAIL. TT"

"DEALER SAID THE STUD AND LUG NUT NEED TO BE REPLACED BECAUSE THE TIRE IS HARD TO REMOVE COMING FROM MANUFACTOR. *AK"

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