Total Complaints
71 filings
ISUZU TROOPER · model year
71 NHTSA complaints, 5 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1991ISUZUTROOPER carries 71 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 5 crashes, 23 fires, 4 injuries, and 3 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1991 TROOPER is power train:automatic transmission with 9 filings, followed by wheels:lugs/nuts/bolts/studs (8) and engine and engine cooling:engine:gasoline (6). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 1 investigation file overlapping the 1991 TROOPER. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
71 filings
Crashes Reported
5 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| POWER TRAIN:AUTOMATIC TRANSMISSION | 9 |
| WHEELS:LUGS/NUTS/BOLTS/STUDS | 8 |
| ENGINE AND ENGINE COOLING:ENGINE:GASOLINE | 6 |
| ENGINE AND ENGINE COOLING:ENGINE | 4 |
| TIRES:TREAD/BELT | 4 |
| ELECTRICAL SYSTEM:WIRING | 3 |
| VEHICLE SPEED CONTROL:ACCELERATOR PEDAL | 3 |
| FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP | 3 |
| SEAT BELTS:FRONT:BUCKLE ASSEMBLY | 2 |
| FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM | 2 |
| ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD | 2 |
| SUSPENSION:FRONT | 2 |
| ENGINE AND ENGINE COOLING:COOLING SYSTEM | 2 |
| VEHICLE SPEED CONTROL | 2 |
| STRUCTURE:BODY:DOOR | 1 |
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 WAS PULLED OVER TO ADJUST THE PEDAL; HOWEVER, THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 04V199000 (VEHICLE SPEED CONTROL). THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 135,000. UPDATED 5/29/15*CN
Mileage: 135,000
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 WAS PULLED OVER TO ADJUST THE PEDAL; HOWEVER, THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 04V199000 (VEHICLE SPEED CONTROL). THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 135,000. UPDATED 5/29/15*CN
Mileage: 135,000
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 ACCELERATOR PEDAL STUCK. *AK
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 ACCELERATOR PEDAL STUCK. *AK
INTERMITTENTLY WHILE DRIVING BETWEEN 50 TO 60 MPH AND SHIFTING FROM LOWER TO HIGHER LEVER GEAR VEHICLE EXPERIENCE SUDDEN ACCELERATION. *AK
VEHICLE'S ENGINE COMPARTMENT CAUGHT ON FIRE.*MR CONSUMER WAS AT A TOLL BOTH WHEN SHE NOTICED SMOKE COMING FROM THE ENGINE COMPARTMENT. SHE PULL OVER INTO THE EMPLOYEE PARKING LOT AND EXITED THE VEHICLE WITH THREE OTHER OCCUPANTS. THE FIRE WAS EXTINGUISHED BY THE FIRE DEPARTMENT. THERE WERE NO INJURIES. *PH *NLM
THERE WAS A RECALL REGARDING THE AUTOMATIC TRANSMISSION, HOWEVER CONSUMER WAS INFORMED VEHICLE WAS NOT INCLUDED DUE TO THE VEHICLE IDENTIFICATION NUMBER.*JB
NO SUMMARY LISTED FOR ABOVE VEHICLE. *AK
ORIGINAL EQUIPMENT ON 1991, TROOPER, P235/75R15 SIZE. TREAD ON LEFT REAR TIRE SEPARATED AT HIGHWAY SPEEDS. *AK CONSUMER STATES VIBRATION STARTED AT 40 MPH AND THE FAILURE WAS SUDDEN, BRIDGESTONE DESERT DUELER TIRE. *SLC
PE00 020; CONSUMER WAS TRAVELING 75MPH ON HIGHWAY AND LOST CONTROL OF VEHICLE BECAUSE REAR TIRE TREAD SEPARATED FROM TIRE, AND FLIPPED MULTIPLE TIMES. *AK DRIVER DIED FROM HEAD INJURIES, I PERSON WAS INJURED, TIRES WERE BRIDGESTONE DESERT DUELLER, SIZE P235/75R15, DOT WK13356. *SLC
TRANSMISSION WAS REPLACED 3 TIMES DUE TO FAILURE OR LEAKAGE AND THIS TRANSMISSION WAS SHOWING SIGNS OF SLIPPAGE AFTER DRIVING 40 MILES ON HIGHWAY. TROOPER WAS BEING OPERATED ON I-895 IN BALTIMORE AT 50 MPH WHEN SMOKE WAS SEEN IN REAR VIEW MIRROR. TROOPER WAS PULLED TO SIDE AND SON EXITED VEHICLE TO CHECK ENGINE. TROOPER IMMEDIATELY BURST INTO FLAMES RESULTING IN A TOTAL LOSS OF VEHICLE AND CONTENTS.*AK
TIRE TREAD SEPARATED, FIRESTONE STYLE. SAME THING HAPPENED A COUPLE YEARS AGO WITH THE SAME TIRE TYPE ON THE SAME CAR. (DOT NUMBER: HYHLF75195 TIRESIZE: 23575R15)
WHILE DRIVING COULD HEAR NOISE COMING FROM REAR LEFT TIRE WHERE TREAD HAD SEPARATED. THEN, PULLED TO THE SIDE OF ROAD AND TIRE STILL HAD AIR IN IT. *AK
NO SUMMARY LISTED FOR ABOVE VEHICLE. *AK
TRANSMISSION ENGINE CYLINDER (4TH CYLINDER) FAILED. NLM
THE TROOPER HAD AN OIL LEAK AND THE ENGINE WENT ON FIRE. MY CAR IS TOTALED. I HAVE BEEN RESEARCHING AND SEE A PROBLEM WITH THIS MODEL AND YEAR. HELP! I WANT ISUZU TO PAY FOR MY LOSE EVEN IF I WAS THE SECOND OWNER OR BOB CIASULLI USED CARS FOR SELLING ME THIS CAR WHICH HAD A RECALL ON AND PUT MYSELF AND MY 5 YEAR OLD SON IN DANGER.
THE TRANSMISSION HAS BEEN SHIFTING ROUGH SINCE THE VEHICLE WAS PURCHASED NEW IN 1991. THE FIRST INCIDENT WAS COVERED UNDER WARRANTY AND SOME MINOR REPAIRS/ADJUSTMENTS WERE MADE BY THE DEALER. THE SECOND INCIDENT REQUIRED MORE EXTENSIVE REPAIRS TO THE TRANSMISSION AND I WAS REQUIRED TO PAY A PORTION OF THE REPAIRS SINCE THE WARRANTY HAD EXPIRED BY SOME 2-3K MILES. UPON THE THIRD INCIDENT WITH THE DRIVE TRAIN, I REQUESTED SOMEONE FROM THE MANUFACTURER TO INVESTIGATE. THEY REQUESTED THAT I KEEP A LOG FOR ABOUT TWO WEEKS OF THE CONDITIONS OCCURRING WHILE DRIVING. AFTER THIS PERIOD, THEY FELT THE PROBLEM WAS IN THE UNIVERSAL JOINTS. THESE WERE REPLACED AND THE PROBLEM STILL EXISTS. OTHER COMPLAINTS IN THE DRIVE TRAIN INVOLVE THE INABILITY OF THE CRUISE CONTROL TO MAINTAIN SPEED ON SLIGHT INCLINES AND WOULD SUFFER A GREAT REDUCTION IN SPEED ON A MODERATE TO STEEP INCLINE. WITH REGARDS TO THE FUEL INJECTION SYSTEM, A FUEL INJECTOR PLUG EXPLODED WHILE DRIVING AT HIGHWAY SPEEDS AND ERUPTE
THE TRANSMISSION HAS BEEN SHIFTING ROUGH SINCE THE VEHICLE WAS PURCHASED NEW IN 1991. THE FIRST INCIDENT WAS COVERED UNDER WARRANTY AND SOME MINOR REPAIRS/ADJUSTMENTS WERE MADE BY THE DEALER. THE SECOND INCIDENT REQUIRED MORE EXTENSIVE REPAIRS TO THE TRANSMISSION AND I WAS REQUIRED TO PAY A PORTION OF THE REPAIRS SINCE THE WARRANTY HAD EXPIRED BY SOME 2-3K MILES. UPON THE THIRD INCIDENT WITH THE DRIVE TRAIN, I REQUESTED SOMEONE FROM THE MANUFACTURER TO INVESTIGATE. THEY REQUESTED THAT I KEEP A LOG FOR ABOUT TWO WEEKS OF THE CONDITIONS OCCURRING WHILE DRIVING. AFTER THIS PERIOD, THEY FELT THE PROBLEM WAS IN THE UNIVERSAL JOINTS. THESE WERE REPLACED AND THE PROBLEM STILL EXISTS. OTHER COMPLAINTS IN THE DRIVE TRAIN INVOLVE THE INABILITY OF THE CRUISE CONTROL TO MAINTAIN SPEED ON SLIGHT INCLINES AND WOULD SUFFER A GREAT REDUCTION IN SPEED ON A MODERATE TO STEEP INCLINE. WITH REGARDS TO THE FUEL INJECTION SYSTEM, A FUEL INJECTOR PLUG EXPLODED WHILE DRIVING AT HIGHWAY SPEEDS AND ERUPTE
TRANSMISSION FLUID LEAKING OUT THROUGH THE MEASURING DIPSTICK AND OVER THE ENGINE, CAUSING VEHICLE TO CATCH FIRE, RESULTING IN EXPLOSION AND MAJOR PROPERTY DAMAGE, PRIOR TO RECALL NOTICE (90V167000). *YC
I HAVE HAD A HISTORY (DOCUMENTED) OF ELECTRICAL/TRANSMISSION PROBLEMS WITH MY 1991 ISUZU TROOPER. ON 11/95, A FAULTY COMPUTER CONTROL PANEL CAUSED MY TRANSMISSION TO FAIL. I HAD A WEEK LEFT ON MY POWERTRAIN WARRANTY. TOOK THE VEHICLE TO ISUZU SANTA MONICA. THEY REPLACED THE COMPUTER PANEL UNDER WARRANTY ON 11/95. 15 MONTHS LATER, MY TRANSMISSION WAS FAILING AGAIN. SAME SYMPTOMS. THIS TIME, I SPENT $2,000 TO HAVE IT REPAIRED. ISUZU REFUSED TO TAKE RESPONSIBILITY. ON 6/12/99, WITHOUT WARNING, THE ENGINE STARTED SMOKING AND WITHIN SECONDS THE ENTIRE ENGINE WAS ON FIRE. THE FIRE DEPT. CAME AND PUT OUT THE FIRE. NOW THE TRUCK IS COMPLETELY TOTALED. I AM IN THE MIDST OF HAVING INSURANCE INSPECTORS DETERMINE THE CAUSE OF FIRE. I HAVE ALL OF MY SERVICE RECORDS FOR THE VEHICLE. IT WAS KEPT IN EXCELLENT CONDITION.
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.