1999 Isuzu Trooper

No clear pattern

1% of complaints about the 1999 Isuzu Trooper arrived in its first year of service. That is an unusual figure for a 1999 vehicle, but with only 97 complaints on record the sample is too small to call it a pattern — the margin of error covers the range where ordinary vehicles sit. The figures below are reported without a verdict. The most-reported system is engine cooling (52 complaints), typically at 6.0 yr or about 70,000 miles.

Complaints: 97
Median age at failure: 5.8 yr
Median mileage: 71,500 n=56
Crash / fire / tow: 14.4% of reports
Safety recalls: 0

In owners’ own words

Engine cooling mileage not reported 2.5 yr in service

VEHICLE BURNS QUART OF OIL EVERY 1500 MILES. ISUZU CLAIMS 1 QT PER 1000 MILES IS ACCEPTABLE INDUSTRY NORM.*AK

Engine cooling mileage not reported 2.6 yr in service

VEHICLE WILL STALL WHILE BRAKING ONLY AT ANY SPEED. TAKEN TO DEALER 3 TIMES, COULD NOT DETERMINE THE CAUSE. *AK

Engine cooling mileage not reported 3.2 yr in service

THIS CAR HAS BEEN A NIGHTMARE. BASICALLY AN ACCIDENT WAITING TO HAPPEN. THE MANUFACTURER AND DEALERSHIP HAVE GIVEN US THE RUN AROUND ON THE VEHICLE. IT STALLS WHEN THE VEHICLE COMES TO A SLOW. OCCURS AT MAJOR INTERSECTIONS WHEN TURNING OR WAITING TO TURN. HAS BEEN SERVICED 8-9 TIMES FOR SAME PROBLEM. 3RD TIME THIS PAST MONTH. CAR BREAKS DOWN ON WAY BACK FROM DEALERSHIP! GETTING NO HELP FROM ISUZU INCORPORATED. *AK

Other Trooper model years

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.

1999 Isuzu Trooper

When each system is reported — middle 50% of complaints

In owners’ own words

Other Trooper model years

How to read this