AI Damage1990 Isuzu Trooper: common problems
Owners of the 1990 Isuzu Trooper filed 23 complaints with NHTSA, most often about engine and cooling and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 23
- involving a crash
- 2
What fails most often
- 1 Engine and cooling 26% of all complaints
- 2 Powertrain 17% of all complaints
- 3 Electrical system 13% of all complaints
- 4 Structure 13% of all complaints
- 5 Fuel system 9% of all complaints
- 6 Service brakes 9% of all complaints
- 7 Tires 9% of all complaints
- 8 Equipment 4% of all complaints
- Engine and cooling: 6 complaints (26% of all).
- Powertrain: 4 complaints (17% of all).
- Electrical system: 3 complaints (13% of all).
- Structure: 3 complaints (13% of all), 1 of them with a crash reported by the owner.
- Fuel system: 2 complaints (9% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2.6 L · petrol · 4 cyl
- 2.8 L · petrol · 6 cyl
- automatic, 4-speed
- manual, 5-speed
Drive: AWD
Symptoms owners describe
How many of the 23 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine and cooling | 6 | 0 | 0 |
| Powertrain | 4 | 0 | 0 |
| Electrical system | 3 | 0 | 0 |
| Structure | 3 | 1 | 0 |
| Fuel system | 2 | 0 | 0 |
| Service brakes | 2 | 0 | 0 |
| Tires | 2 | 0 | 0 |
| Equipment | 1 | 0 | 0 |
| Seat belts | 1 | 0 | 0 |
| Seats | 1 | 1 | 0 |
| Steering | 1 | 1 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
During a rearend collision, driver's seatback broke, causing minor injury to driver.
Experienced a rollover while driving down hill, the car started to fishtail and turned around into on coming traffic and the trooper rolled over onto the right side. Consumer was injured in accident.
My 1990 isuzu trooper, standard, intensifies its revs in idle suddenly. Sometimes it goes up and down, up and down... And I can see how the temp gauge rises quickly.
Rear passenger side tire tread started to separate, causing the consumer had to pull over. Sears, trail handler, size#p235/75/r15, dot#3dhllbe488.
My 1990 isuzu trooper is exhibiting dangerous revving and dropping of the idle. The truck accelerates without warning and is impossible now to drive safely. It is my understanding that the ecu in these trucks is faulty due to manufacturing defects. I further understand that thousands of others have these problems.
The back left tire was defective (steel showing) causing the driver to loose control and run across the s/b lane of traffic and struck a guardrail, the vehicle the overturned going over the gouardrail down into a creek bed, the vehicle then flipped rear over front one complete time, all 4 occupants were injured…
Consumer pulled into parking lot, and noticed smoke from front of vehicle. Stopped vehicle , turned off engine, and saw flames were coming from under fender on passenger side. Vehicle was totalled.
This vehicle started on fire; think it is in relation to transmission dip stick leak.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 7,735 of 36,656 model years in the NHTSA data (top 21% most complained about).
On average one model year of the Trooper has 31 complaints (19 years in the data). This year has 23, below average.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Other years of this model
- Trooper 19853 sources
- Trooper 198618 sources
- Trooper 19876 sources
- Trooper 198817 sources
- Trooper 198916 sources
- Trooper 199157 sources
- Trooper 199225 sources
- Trooper 199333 sources
- Trooper 199447 sources
- Trooper 199554 sources
- Trooper 199651 sources
- Trooper 199713 sources
- Trooper 199842 sources
- Trooper 199981 sources
- Trooper 200049 sources
- Trooper 200129 sources
- Trooper 200212 sources
- Trooper 99995 sources
Questions and answers
What are the most common problems with the 1990 Isuzu Trooper?
Owner complaints to NHTSA most often mention: engine and cooling, powertrain, electrical system. Total complaints: 23. The most frequent symptoms in complaint texts: smoke, burning smell, fire (22%), engine failure or replacement (4%), knocking, grinding or other noise (4%).
How many service bulletins (TSB) were issued for the 1990 Isuzu Trooper?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1990 Isuzu Trooper from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1990 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.