1991 Isuzu Impulse problems & reliability
25 owner complaints filed with NHTSA for the 1991 Isuzu Impulse. 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.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 9 | 36% |
| Vehicle Speed Control | 7 | 28% |
| Engine and Engine Cooling | 5 | 20% |
| Unknown OR Other | 4 | 16% |
| Exterior Lighting | 1 | 4% |
| Latches/locks/linkages | 1 | 4% |
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.
Complaints by incident year
What owners report
“I have a 1991 isuzu impulse and it's having ecu problems. My mechanic says it needs to be replaced. I see that this is a recurring problem with these cars, and it shouldn't fall on the shoulders of the consumers. *ak”
Electrical System · filed Apr 19, 2004
“The consumer stated that the vehicle is experiencing the same idle control problems as stated in previous recall regarding the electronic control unit. *yh”
Electrical System · filed May 14, 2002
“The symptoms of this fault are most notably 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. These symptoms will often only occur in warmer weather as the metal circuits of the circuit…”
Vehicle Speed Control · filed Jan 9, 2002
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- TAKATA SEAT BELT BUCKLE FAILURE
Engineering Analysis EA95009 · opened Mar 10, 1995 · closed Aug 2, 1995 · led to recall 95V103009
Technical service bulletins
4 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1991 Isuzu Impulse.
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
This technical service bulletin outlines the detailed procedures for the air conditioning system conversion / retrofit. *tt
SB0012S002 · Service Bulletin/Repair Instructions · issued Mar 1, 2000
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 1991 Isuzu Impulse 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 1991 Isuzu Impulse?
- · 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.