1991 Isuzu Trooper problems & reliability
57 owner complaints filed with NHTSA for the 1991 Isuzu Trooper. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
3 complaints report injuries (4 injured, 3 deaths reported).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling → | 13 | 23% |
| Power Train → | 12 | 21% |
| Wheels | 8 | 14% |
| Electrical System | 7 | 12% |
| Fuel System, Gasoline | 6 | 11% |
| Vehicle Speed Control | 5 | 9% |
| Tires | 4 | 7% |
| Service Brakes, Hydraulic | 3 | 5% |
| Exterior Lighting | 2 | 4% |
| Seat Belts | 2 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Complaints by incident year
What owners report
“Tl* the contact owns a 1991 isuzu trooper. The contact stated that the accelerator cable was stuck which caused the accelerator pedal not to release. The failure was progressing more frequently. The contact stated that the engine speed would not immediately decrease upon the release of the accelerator pedal and the…”
Vehicle Speed Control · filed Feb 12, 2015
“While applying the brake pedal consumer heard a loud squeaking noise and vehicle vibrated uncontrollably. Vehicle was taken to the dealer for inspection, and mechanic determined that the brake pads needed to be replaced. Also, consumer noticed that while applying the accelerator pedal vehicle failed to move and the…”
Service Brakes, Hydraulic · filed Nov 19, 2004
“Intermittently while driving between 50 to 60 mph and shifting from lower to higher lever gear vehicle experience sudden acceleration. *ak”
Vehicle Speed Control · filed May 4, 2004
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- ENGINE COMPARTMENT FIRES
Defect Petition DP92015 · opened Jul 30, 1992 · closed Nov 25, 1992
- HEATER CORE FAILURE
Engineering Analysis EA92018 · opened Jun 2, 1992 · closed Apr 2, 1993
- DEFECTIVE HEATER CORES
Defect Petition DP92005 · opened Mar 3, 1992 · closed Jun 2, 1992
- REAR DOOR HINGE SEPARATION
Engineering Analysis EA91033 · opened Jul 15, 1991 · closed Jul 28, 1992 · led to recall 92V093000
- REAR DOOR HINGE SEPARATION
Preliminary Evaluation PE91046 · opened Feb 19, 1991 · closed Jul 15, 1991
Technical service bulletins
4 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1991 Isuzu Trooper.
This bulletin outlines the procedures for using the Alpine Exchange Program (the "Exchange Program"). The Exchange Program must be used when any Alpine radio or other component covered by this bulletin is repaired under…
IB13-R-001G · Service Bulletin/Repair Instructions · issued May 8, 2023
Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these…
WB13-X-001B · Service Bulletin/Repair Instructions · issued Aug 30, 2022
Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these…
WB13-X-001A · Service Bulletin/Repair Instructions · issued Aug 2, 2022
This technical service bulletin outlines the detailed procedures for the air conditioning system conversion / retrofit. *tt
SB0012S002 · Service Bulletin/Repair Instructions · issued Mar 1, 2000
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1991 Isuzu Trooper in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1991 Isuzu Trooper?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.