1989 Isuzu I Mark Electrical system Problems
- Complaints
- 4about this part
- Share
- 40%of 10 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 1989 Isuzu I Mark, 40% of the 10 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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 stranded in the heat. This unit should be recalled. It would be nice to have some of the hundreds spent on mis-diagnosis, motel bill's and towing service, etc. Reimbursed by GM/delco -Isuzu. Please contact me if necessary. Dt”
NHTSA complaint #769977, filed 2002-11“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 turned on when cold, only occasionally after it is warmed up. I would try repairing it, but I have a great deal of experience with this engine/ecu combination, and almost all of them (including dealer-supplied replacement ecus, which are frightfully expensive) do this. …”
NHTSA complaint #741920, filed 2001-03“Engine revs up to 2500 rpms while in neutral, then when it's put into gear it will stall out. Mechanic says its the ecu. Problem is hard to duplicate.”
NHTSA complaint #841753, filed 1999-07Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1989 | 4 | 40% |
Other parts of the 1989 Isuzu I Mark
2 complaintsOther or unknown
2 complaintsVehicle speed control
2 complaintsBrakes
1 complaintsSeat belts
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 1989 Isuzu I Mark
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology