Owners have filed 10 complaints on the Isuzu I-Mark, covering 1987–1989. The system named most often is Electrical System (3 reports). Worst years by volume: 1989, 1987; cleanest: 1987, 1989. On average the car was 9.0 years old when the problem happened.
What breaks on Isuzu I-Mark
Grouped by the system owners named — percentages are shares of all 10 I-Mark complaints. Open any row for the full reports in owners' own words.
Electrical System 3 Read
The computer in this car causes for an extremely erratic idle. When the vehicle is first turned on, the idle speed is normal and steady for about 5 to 10 seconds, and then all bets are off. Sometimes it goes up, sometimes it goes down, ranging anywhere from near-stall to 3000 RPM. It does this every time the car is…
The ECU has caused erratic engine behaviour and complete engine failure leaving us stranded on numerous occasions. Mechanics have been unable to resolve the issue and the vehicle has been untrustworthy over it's entire life. Many times the ignition system has failed in traffic with our babies in the car leaving us…
This is the second ECU to go bad. Causes engine to rev, die, sputter,etc. Makes driving very difficult and dangerous when happens!
Engine And Engine Cooling 2 Read
Erratic idle, idle revving and dropping, idle dipping often with engine dying, idle hanging high above 2,000 RPM, and engine dying or stalling for no reason with no trouble codes
ECU has failed, causing erractic idle/ vehicles stalling. Please provide further information
Seat Belts 2 Read
Rear seat belts have failed, seat belts will not retract from its position, both seat belt needs replacement. Tt
All the seat belts in the car failed to latch. The owner has written a letter to congressman also spoke to dealer nothing happened. Tt
Power Train 1 Read
No summary listed for above vehicle
I-Mark years to avoid — and the clean ones
Complaints per model year. More reports usually means more cars on the road as well as more trouble, so read the crash and fire columns alongside the count.
| Model year | Complaints | Top system | Crashes | Fires |
|---|---|---|---|---|
| 1989 | Electrical System | — | — | |
| 1987 | Electrical System | — | — |
The same model year, different builds
Every complaint carries the first 11 characters of the VIN — plant, year, body and engine. That is a production series, and complaints are spread across them very unevenly.
| Measure | Value |
|---|---|
| Distinct production series | 10 |
| Average complaints per series | 1 |
| Worst single series | 1 complaints |
| Average age at failure | 9.0 years |
A model average of 1 hides a worst series at 1. Enter a VIN above to see the numbers for that exact build instead of the model as a whole.
Owners reported these. Find out if yours is one of them.
- Complaints matched to the exact production run, not just the model
- What the car is worth given what tends to fail on it
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How we count
Every figure here comes from complaints owners filed with NHTSA — 1,100,006 of them, covering 1,982 models built between 1981 and 2026.
A complaint is an unverified report: someone wrote down what happened to their car. It is not a confirmed defect and not a recall. What makes the volume useful is the pattern — when thousands of owners of the same build describe the same failure, that is a signal no marketing brochure will give you.
Two things we do that the source does not. First, we compute the age of the car at the moment of failure from the incident date and the model year. Second, we group complaints by the first 11 characters of the VIN — the production series — so a bad plant run does not disappear into a model-wide average.
Frequently asked questions
What are the worst years for the I-Mark?
By complaint volume, 1989, 1987 drew the most owner reports. Bear in mind that popular years put more cars on the road, so check the crash and fire columns too.
Which I-Mark years are the cleanest?
1987, 1989 have the fewest complaints on file. For recent years that can simply mean the cars are young.
How many complaints does the Isuzu I-Mark have?
10 owner complaints filed with NHTSA, covering 1987–1989. Of those, 0 describe a crash and 0 a fire.
Are these complaints verified?
No. They are unverified reports from owners. NHTSA publishes them as filed and investigates only a fraction. The value is in the pattern, not in any single report.
Can I check complaints for one specific car?
Yes — enter its VIN above. We match the first 11 characters, which identify the plant, year, body and engine, so you get complaints on that exact production series rather than the whole model.