1999 Isuzu TrooperRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 81 owner complaints for the 1999 Isuzu Trooper. Most complaints involve engine and engine cooling (56) and power train (8). The EPA rates it 15 mpg combined.
Safety recalls
Owner complaints by component
- Engine and engine cooling56
- Power train8
- Vehicle speed control7
- Electrical system5
- Steering4
- Visibility3
- Engine2
- Fuel/propulsion system2
- Suspension2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
What owners report most
Engine and engine cooling
“99 ISUZU TROOPER 3.5 ENGINE BURNS OIL EXCESSIVELY. I AM ORIGINAL OWNER AND REGULARLY SERVICED PER OWNERS MANUAL. AT 50K MILES, ENGINE OIL LIGHT TURNED ON 2,500 MILES AFTER OIL CHANGE AND WAS OVER 4 QTS LOW. ENGINE NOW AT 60K MI AND BURNING APPROX. 1 QT PER 600-700 MILES. SEEMS TO BE COMMON ENGINE DEFECT KNOWN BY MECHANICS AND OWNERS, BUT ISUZU UNWILLING TO ACKNOWLEDGE PROBLEM. THOUGH MONITORING CONSTANTLY, I AM JUST WAITING FOR SIGNIFICANT ENGINE FAILURE. *TR”
Power train
“WHILE DRIVING SOUTH ON US INTERSTATE 89 NEAR MONTPELIER, VT, PULLED OVER TO ADJUST STUCK WINDSHIELD WIPER (DUE TO SNOW). AFTER EXITING HIGHWAY VIA EXIT RAMP AND PARKING IN A PARKING LOT, RETURNED TOWARDS HIGHWAY AFTER ABOUT A 5 MINUTE DELAY. AS WAS ACCELERATING UP THE ON RAMP, TRANSMISSION "LET GO" AND ENGINE REVVED. TRANSMISSION WOULD NO LONGER SHIFT AND REMAINED STUCK IN 2ND GEAR. LIMPED TO NEAREST SERVICE STATION. VEHICLE WAS TOWED TO ISUZU DEALERSHIP WHERE METAL WAS FOUND IN THE TRANNY PAN UPON INSPECTION INDICATING TRANSMISSION FAILURE. VEHICLE HAD 79K MILES, WAS SERVICED AT 60K AS PER MANUFACTURER'S RECOMMENDATIONS, NO OTHER DRIVETRAIN PROBLEMS OR INDICATION OF IMMINENT FAILURE BEFORE INCIDENT. TRANSMISSION (4L30E) HAD TO BE REPLACED WITH NEW TRANSMISSION. *JB”
Vehicle speed control
“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 FOR A WHILE AND FINALLY STARTED. TODAY, INITIALLY WOULD NOT START. NEXT TIME STARTED RPM'S AT OVER 2, DROPPED WHEN SHIFTED TO REVERSE, WHEN SHIFTED TO DRIVE VEHICLE ACCELERATED WITHOUT USE OF GAS PEDAL UP TO STEADY 35 MPH ON CITY STREET. AFTER 1 MILE, AT NEXT INTERSECTION STARTED MAKING THAT STRANGE NOISE IN ENGINE COMPARTMENT (LIKE AIR OR FLUID UNDER PRESSURE IE AIR COMPRESSOR/HIGH PRESSURE WATER SOUND) WHILE PRESSING BRAKE SHIFTED INTO NEUTRAL RPM'S REVVED TO 2.5, IN DRIVE AND REVERSE DROPPED TO 1.5, IN PARK REVVED TO 2.5, AFTER TURN AUTOMOBILE ACCELERATED TO STEADY 40 MPH ON CITY STREET WITHOUT GAS BEING PUSHED AT NEXT STOP (1 MILE) RETURNED TO NORMAL IDLE AND OPERATION. HAS PROBLEM BOTH WHEN COLD AND HOT WEATHER AND COLD OR HOT START. IT HAS NOT PRODUCED A CHECK ENGINE LIGHT OR ANY CODES”
Engines, transmissions & drive
- EPA class
- Sport Utility Vehicle - 4WD
- Engines
- 3.5L 6-cyl
- Transmissions
- Automatic 4-spd · Manual 5-spd
- Drive
- 4-Wheel or All-Wheel Drive
- Fuel
- Regular Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
EPA fuel economy by version
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Trooper Auto 4-spd, 6 cyl, 3.5 L · 4-Wheel or All-Wheel Drive | 13 | 18 | 15 | $4,150 | 592 |
| Trooper Man 5-spd, 6 cyl, 3.5 L · 4-Wheel or All-Wheel Drive | 14 | 18 | 15 | $4,150 | 592 |
- 15mpg comb.
- 15mpg comb.
NHTSA 5-Star Safety Ratings
Maintenance basics
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
1999 Trooper questions
How many recalls does the 1999 Isuzu Trooper have?
0 recalls found in NHTSA data as of Nov 11, 2026.
What are the most common 1999 Isuzu Trooper problems?
Owners filed 81 complaints with NHTSA. The most-cited components are engine and engine cooling (56), power train (8), vehicle speed control (7). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 1999 Isuzu Trooper get?
The EPA rates the 1999 Isuzu Trooper at 15 mpg combined, depending on engine and drivetrain (2 versions rated).