AI Damage2004 Isuzu Ascender: common problems
Owners of the 2004 Isuzu Ascender filed 64 complaints with NHTSA, most often about electrical system and fuel system. Details by component below, with sources.
Key figures
- Owner complaints
- 64
What fails most often
- 1 Electrical system 53% of all complaints
- 2 Fuel system 16% of all complaints
- 3 Fuel/propulsion system 11% of all complaints
- 4 Exterior lighting 9% of all complaints
- 5 Engine 6% of all complaints
- 6 Visibility 6% of all complaints
- 7 Seat belts 5% of all complaints
- 8 Service brakes 5% of all complaints
- Electrical system: 34 complaints (53% of all).
- Fuel system: 10 complaints (16% of all).
- Fuel/propulsion system: 7 complaints (11% of all).
- Exterior lighting: 6 complaints (9% of all).
- Engine: 4 complaints (6% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4.2 L · petrol · 6 cyl
- 5.3 L · petrol · 8 cyl
- automatic, 4-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 64 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) |
|---|---|---|---|
| Electrical system | 34 | 0 | 0 |
| Fuel system | 10 | 0 | 0 |
| Fuel/propulsion system | 7 | 0 | 0 |
| Exterior lighting | 6 | 0 | 0 |
| Engine | 4 | 0 | 0 |
| Visibility | 4 | 0 | 0 |
| Seat belts | 3 | 0 | 0 |
| Service brakes | 3 | 0 | 0 |
| Engine and cooling | 2 | 0 | 0 |
| Powertrain | 2 | 0 | 0 |
| Structure | 2 | 0 | 0 |
| Tires | 2 | 0 | 0 |
| Air bags | 1 | 0 | 0 |
| Equipment | 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.
The low beams on my headlights will go out without warning while driving at night. My daytime running lights also will turn off without warning and turn back on but this is not as much of a safety issue as when it happens during nighttime driving.
Tl* the contact owns a 2004 isuzu ascender. While driving approximately 60 mph, the vehicle decelerated without warning. The failure occurred numerous times. The vehicle was taken to an independent mechanic where it was diagnosed that the bank one sensor was running rich and the bank two sensor was running lean.
While driving my cars brakelight came on and the car started to accelerate faster and faster. Pullled over as soon as I could and stopped the car and turned the engine off. The check gauges warning light comes on even when the car is sitting idle or when I pull up and stop at a red light it comes on.
Vehicle headlights work very erratically both when vehicle is parked or in motion. Low-beam lights will go off on a moment's notice and only high-beam lights will work. More recently, even the high-bean lights have been acting up and turning off. Headlights sockets were replaced at some point but problem persists.
My back vents for my a/c do not work, the back door opens all the time one time it opened and all our groceries fell out and when I try to pump gas into my car it would take forever the pump would stop like it was full but now it just spills out and my car smells like gas so bad on the inside I can't even drive it…
Tl* the contact owns a 2004 isuzu ascender. While attempting to close the rear passenger side door, the door would not properly latch and close. The contact stated that the rear driver side door failed to latch properly intermittently.
The contact also noticed smoke and flames coming from the control panel of the arm rest on the front driver side door. The contact was able to extinguish the fire.
While my wife was driving the vehicle both lowbeam headlights just went out. She was forced to drive with highbeams to get home. After replacing both lights and checking all fuses I am at a loss of what the problem is. We cannot drive this vehicle at night due to safety concerns.
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 4,654 of 36,656 model years in the NHTSA data (top 13% most complained about).
On average one model year of the Ascender has 41 complaints (5 years in the data). This year has 64, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
Other years of this model
Questions and answers
What are the most common problems with the 2004 Isuzu Ascender?
Owner complaints to NHTSA most often mention: electrical system, fuel system, fuel/propulsion system. Total complaints: 64. The most frequent symptoms in complaint texts: warning lights, check engine (20%), headlights and tail lights (9%), windows, sunroof (8%).
How many service bulletins (TSB) were issued for the 2004 Isuzu Ascender?
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 2004 Isuzu Ascender 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 2004 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.