What are the common problems with the 1999 Isuzu Trooper?
Owners of the 1999 Isuzu Trooper have filed 81 complaints with NHTSA, most often about engine cooling (56) and the powertrain (8). In NHTSA's complaints file of November 11, 2026, 45 of them list a mileage; a complaint is an owner's report, not a proven defect.
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See what the paid report includes →NHTSA's file holds 81 owner complaints on the 1999 Isuzu Trooper. Owners named engine cooling most often: 56 complaints, and half of the 35 that list a mileage came after 69,000 miles. A complaint can name more than one component. Of the 81 complaints, 5 report a crash, 1 reports a fire and 2 report an injury (4 people reported injured). These are owners' reports to NHTSA, not findings.
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Common problems with the 1999 Trooper
NHTSA's file holds 81 owner complaints on the 1999 Isuzu Trooper. Owners named engine cooling most often: 56 complaints, and half of the 35 that list a mileage came after 69,000 miles. A complaint can name more than one component.
| Component (NHTSA category) | Complaints | Listing mileage | Median mileage |
|---|---|---|---|
| Engine And Engine Cooling | 56 | 35 | 70,000 |
| Power Train | 8 | 3 | Under 5 mileages |
| Vehicle Speed Control | 7 | 5 | 160,500 |
| Electrical System | 5 | 2 | Under 5 mileages |
| Steering | 4 | 1 | Under 5 mileages |
Of the 81 complaints, 5 report a crash, 1 reports a fire and 2 report an injury (4 people reported injured). These are owners' reports to NHTSA, not findings.
Mileage when owners reported a problem with the 1999 Trooper
The 45 mileages owners gave run from 20,000 to 164,538 miles. A quarter are at or under 52,000 miles, half at or under 71,500, three quarters at or under 77,800 and nine in ten at or under 139,224; 7 (16%) came after 100,000 miles, 4 (9%) after 150,000 and none after 200,000.
These mileages say when owners reported a problem, not when a 1999 Trooper wears out. NHTSA's file holds only vehicles whose owners complained; one that ran without a problem never appears in it, so it gives no lifespan and no cutoff, and how a vehicle was maintained matters more than any one odometer reading.
Most of these reports came early in the vehicle's life: 38 of the 45 came at or under 100,000 miles, so they say nothing about how many miles a 1999 Trooper can cover.
| Measure | Value |
|---|---|
| Lowest mileage listed | 20,000 miles |
| 25th percentile | 52,000 miles |
| Median (50th percentile) | 71,500 miles |
| 75th percentile | 77,800 miles |
| 90th percentile | 139,224 miles |
| Highest mileage listed | 164,538 miles |
| Complaints after 100,000 miles | 7 (16%) |
| Complaints after 150,000 miles | 4 (9%) |
| Complaints after 200,000 miles | none |
Is the 1999 Trooper a good year?
Complaint counts cannot say whether the 1999 is a good or a bad Trooper: they rise with how many were sold and how long they have been on the road. They show how the 1999 compares with the other model years in NHTSA's file.
With 81 complaints, the 1999 drew the most of the 16 Isuzu Trooper model years from 1986 to 2002 with 10 or more complaints. The fewest: the 2002 (12).
Recent model years have had less time to collect complaints, so their counts are still growing. No year is ranked by mileage here, because a year's median mileage mostly follows its age.
| Model year | Owner complaints | Listing mileage | Median mileage |
|---|---|---|---|
| 1986 Trooper | 18 | 1 | Under 10 mileages |
| 1988 Trooper | 17 | 0 | Under 10 mileages |
| 1989 Trooper | 16 | 0 | Under 10 mileages |
| 1990 Trooper | 23 | 1 | Under 10 mileages |
| 1991 Trooper | 57 | 1 | Under 10 mileages |
| 1992 Trooper | 25 | 2 | Under 10 mileages |
| 1993 Trooper | 33 | 5 | Under 10 mileages |
| 1994 Trooper | 47 | 10 | 85,000 |
| 1995 Trooper | 54 | 8 | Under 10 mileages |
| 1996 Trooper | 51 | 5 | Under 10 mileages |
| 1997 Trooper | 13 | 5 | Under 10 mileages |
| 1998 Trooper | 42 | 16 | 50,000 |
| 1999 (this page) | 81 | 45 | 71,500 |
| 2000 Trooper | 49 | 22 | 70,100 |
| 2001 Trooper | 29 | 17 | 80,000 |
| 2002 Trooper | 12 | 6 | Under 10 mileages |
1999 Isuzu Trooper recalls
NHTSA's recall files of November 11, 2026 list no campaign for the 1999 model year under the name TROOPER. Recalls can be filed under another name (a trim, a body or a series name), so a recall may still exist for the 1999 Isuzu Trooper: check the VIN with NHTSA's free recall lookup.
What these figures can and cannot tell you
- Complaints are owners’ reports to NHTSA. NHTSA publishes them without verifying them: a complaint is an allegation, not a defect finding.
- The mileage is what the owner wrote on the complaint; NHTSA does not check it against the odometer.
- The make, model and model year are the ones on the complaint. NHTSA records them as filed, so a few complaints sit under a model year the name was not sold in.
- They are not a lifespan study. The file holds only vehicles whose owners reported a problem, so these figures do not say how long a typical 1999 Trooper lasts.
- A complaint count rises with how many vehicles were sold and how long they have been on the road, so it is not a rating of the 1999 Trooper.
- Nothing here describes one vehicle: its title brands, odometer readings, accidents and open recalls are in the records for its own VIN.
- 36 of the 81 complaints on the 1999 Isuzu Trooper give no usable mileage (blank, zero, a filler such as 999999, or over 500,000) and are left out of every mileage figure.
- NHTSA name counted: TROOPER. NHTSA files some vehicles under several names (a series name and a trim name, for example); this page counts only this one.
- Recall-file name matched: TROOPER.
Primary sources behind this page
Open the underlying public source and verify that its scope matches the question you are asking.
- NHTSA complaints flat file (FLAT_CMPL.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- Complaints file field layout (CMPL.txt)National Highway Traffic Safety Administration
- NHTSA recalls flat file (FLAT_RCL_PRE_2010.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- NHTSA recalls flat file (FLAT_RCL_POST_2010.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- Recalls file field layout (RCL.txt)National Highway Traffic Safety Administration
- NHTSA recall and complaint datasets: scope and documentationNational Highway Traffic Safety Administration
- Recalls Lookup by VINNational Highway Traffic Safety Administration
NHTSA’s complaints file was downloaded on November 11, 2026 (FLAT_CMPL.txt, dated 2026-11-11 10:15, 2,265,416 rows), with its recall files (FLAT_RCL_PRE_2010.txt and FLAT_RCL_POST_2010.txt, dated 2026-11-11 08:02). Each complaint is counted once, by its NHTSA number, with the model year and mileage of its first row; a model year has a page only with 10 or more complaints. The collection script and its rules are in scripts/collect-nhtsa-model-year-longtail.mjs.
1999 Isuzu Trooper questions
What are the most common 1999 Isuzu Trooper problems?
NHTSA's file holds 81 owner complaints on the 1999 Isuzu Trooper. Owners named engine cooling most often: 56 complaints, and half of the 35 that list a mileage came after 69,000 miles. A complaint can name more than one component. Of the 81 complaints, 5 report a crash, 1 reports a fire and 2 report an injury (4 people reported injured). These are owners' reports to NHTSA, not findings.
At what mileage do owners report problems with the 1999 Isuzu Trooper?
Of the 45 complaints on the 1999 Isuzu Trooper that list mileage, the middle half came between 52,000 and 78,000 miles; 7 (16%) came after 100,000 miles, 4 (9%) after 150,000 and none after 200,000. These are mileages at a reported problem; they do not say how many miles a 1999 Trooper can cover.
Is the 1999 Isuzu Trooper a good year?
Complaint counts cannot say whether the 1999 is a good or a bad Trooper: they rise with how many were sold and how long they have been on the road. They show how the 1999 compares with the other model years in NHTSA's file. With 81 complaints, the 1999 drew the most of the 16 Isuzu Trooper model years from 1986 to 2002 with 10 or more complaints. The fewest: the 2002 (12).
How many recalls does the 1999 Isuzu Trooper have?
NHTSA's recall files of November 11, 2026 list no campaign for the 1999 model year under the name TROOPER. Recalls can be filed under another name (a trim, a body or a series name), so a recall may still exist for the 1999 Isuzu Trooper: check the VIN with NHTSA's free recall lookup.
How do I check a used 1999 Isuzu Trooper before buying?
Take the 17-character VIN from the vehicle and compare the odometer with the readings on file for it: title transfers, inspections and auction sales record the mileage on the day. VIN Lookup (free-vin-lookup.com) sells the original ClearVIN PDF for $14.99 (3 reports for $29.99, 5 for $44.99): odometer readings, title brands and auction records on file for the VIN. Check the VIN before buying a used 1999 Isuzu Trooper.