"How reliable is the 1999 Isuzu Trooper?"

"Based on 105 NHTSA complaints, the 1999 Isuzu Trooper has a median complaint mileage of 71379 miles. The most common issue is ENGINE AND ENGINE COOLING:ENGINE."

"What are common problems with the 1999 Isuzu Trooper?"

"The most frequently reported component in NHTSA complaints for the 1999 Isuzu Trooper is ENGINE AND ENGINE COOLING:ENGINE, accounting for a significant portion of the 105 total complaints filed."

1999 Isuzu Trooper: Reliability Data

Source: NHTSA — 105 complaints

105

Total Complaints

71,379mi

Median Mileage

ENGINE AND ENGINE COOLING:ENGINE

Top Issue

Crash Reports

When Do Complaints Happen?

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

50,000 25th Percentile

71,379 Median Mileage

77,546 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE AND ENGINE COOLING:ENGINE

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

ENGINE AND ENGINE COOLING

VEHICLE SPEED CONTROL

POWER TRAIN:AUTOMATIC TRANSMISSION

ELECTRICAL SYSTEM

STEERING:LINKAGES:TIE ROD ASSEMBLY

ENGINE

FUEL/PROPULSION SYSTEM

ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"VERY HEAVY WATER LEAKAGE RESULTING FROM POORLY INSTALLED WINDSHIELD AND/OR SEALS AT THE FACTORY.*AK"

"MY TROOPER FIRST ENTERED THE SHOP ON DECEMBER 13, 1999, AND WAS IN FOR THE SAME PROBLEM ON TWO OTHER OCCASIONS. THE CAR HAS RUN HOT THREE DIFFERENT TIMES, AND HAS THE ENGINE HAS RUN MANY MILES WITH A MIXTURE OF OIL AND WATER IN THE ENGINES INTERNAL COMPONENTS. I AM VERY CONCERNED ABOUT AN ENGINE F..."

"VEHICLE WAS PARKED ON SLIGHT HILL WHEN IT POPPED OUT OF GEAR. ALSO, EMERGENCY BRAKE FAILED, CAUSING IT TO ROLL DOWN INTO A TREE. ISUZU ENGINEERS CLAIMED VEHICLE PASSED ALL SPECIFICATIONS, BUT CONSUMER KNEW FOR A FACT THAT IT DID NOT HOLD. VEHICLE WILL ONLY BRAKE AT THE TEN O'CLOCK. ALSO PRIOR TO I..."

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

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

ENGINE AND ENGINE COOLING:ENGINE 29 complaints

25th: 49,250 mi Median: 66,126 mi 75th: 71,625 mi

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE 17 complaints

25th: 59,450 mi Median: 73,100 mi 75th: 88,100 mi

ENGINE AND ENGINE COOLING 10 complaints

25th: 55,000 mi Median: 70,000 mi 75th: 77,216 mi

VEHICLE SPEED CONTROL 7 complaints

25th: 49,900 mi Median: 160,500 mi 75th: 164,538 mi

Where Are Complaints Coming From?

Top states by complaint count.

WV: 9 DC: 8 TX: 6 CA: 6 NY: 5 KS: 5 MN: 5 OH: 4 SC: 4 WI: 4

Who Files Complaints?

32.4%

Original Owners

67.6%

Second+ Owners

Isuzu Trooper — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1990	30	-	POWER TRAIN:AUTOMATIC TRANSMISSION	3
1991	71	-	POWER TRAIN:AUTOMATIC TRANSMISSION	5
1992	27	-	ENGINE AND ENGINE COOLING:ENGINE	4
1993	41	22,300	ENGINE AND ENGINE COOLING:ENGINE	7
1994	58	85,149	TIRES	5
1995	65	134,000	AIR BAGS:FRONTAL	15
1996	66	124,567	SUSPENSION	5
1998	48	59,172	ENGINE AND ENGINE COOLING:ENGINE	2
2000	61	70,550	ENGINE AND ENGINE COOLING:ENGINE:GASOLINE	6
2001	42	80,000	VEHICLE SPEED CONTROL	2

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