1999 Isuzu Trooper problems & reliability
81 owner complaints filed with NHTSA for the 1999 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.
2 complaints report injuries (4 injured).
Federal crash records (FARS 2020–2023): 1999 Isuzu Trooper vehicles were involved in 3 fatal crashes with 3 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling | 56 | 69% |
| Power Train | 8 | 10% |
| Vehicle Speed Control | 7 | 9% |
| Electrical System | 5 | 6% |
| Steering | 4 | 5% |
| Visibility | 3 | 4% |
| Engine | 2 | 2% |
| Equipment | 2 | 2% |
| Fuel/propulsion System | 2 | 2% |
| Fuel System, Gasoline | 2 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 71,500 miles (middle 50% between 52,000 and 77,800 miles), based on 45 complaints that included mileage.
Complaints by incident year
What owners report
“75000 miles. Burns a quart of oil every few hundred miles. No oil light comes up. I ran it almost out of oil in 06/2018”
Engine · filed May 10, 2019
“While driving the vehicle it began to surge as if it was stuck in high gear. The gas peddle seemed to be stuck and the vehicle started to go faster and faster. I applied the brakes and the tires screeched while the vehicle was still in motion forward. I shut off the engine and applied the brakes to stop the auto.”
Fuel/propulsion System · filed Oct 3, 2016
“Last 3 weeks - initially seemed like power loss/surge, then heard unusual sound coming from engine compartment 1 week ago, engine started to die while operating on city/residential streets whenever not pushing gas (slowing to turn or stop) friday, would not even hold idle to start, pushed gas and held rpm's at 1 - 1.5…”
Vehicle Speed Control · filed Mar 21, 2016
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
20 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 Isuzu Trooper. The 10 most recent:
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
The Isuzu Commercial Truck of America (ICTA) Service Technical Assistance Center (TAC) provides diagnostic support to Isuzu dealer technicians repairing Isuzu vehicles in and out of vehicle warranty. A TAC case number…
IB09-X-004C · Service Bulletin/Repair Instructions · issued Jul 20, 2022
The following is a list of the Isuzu-recommended Threebond product part numbers identified in the various Isuzu Workshop Manuals and bulletins. If a Threebond product is unavailable, we recommend that you utilize the…
IB09-X-002B · Service Bulletin/Repair Instructions · issued Jul 20, 2022
This informational bulletin provides the technician with information on what E85 fuel may due to a non E85 vehicle.
05-06-04-035D · Service Bulletin/Repair Instructions · issued May 9, 2014
This Preliminary Information communication provides information to the technician with the axel setup information from American Axle Manufacturing. Technician should be advised that the maximum pinion shim to be used or…
PIP3720D · Service Bulletin/Repair Instructions · issued Nov 26, 2012
Throttle body mounting bolt torque specifications. *tt
0301S002 · Service Bulletin/Repair Instructions · issued May 1, 2003
Transmission indicator light may be on and diagnostic trouble code p1870 is set in the powertrain control module (pcm). *tt
0305S001 · Service Bulletin/Repair Instructions · issued May 1, 2003
Transmission indicator light may be on and diagnostic trouble code p1870 is set in the pcm (powertrain control module). *tt
0205S003 · Service Bulletin/Repair Instructions · issued Dec 1, 2002
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 1999 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 1999 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.
- · Owners most often reported problems around 71,500 miles — budget accordingly if the car is approaching that mileage.