AI Damage1991 Infiniti Q45: common problems
Owners of the 1991 Infiniti Q45 filed 34 complaints with NHTSA, most often about equipment and service brakes. Details by component below, with sources.
Key figures
- Owner complaints
- 34
- involving a crash
- 3
What fails most often
- 1 Equipment 21% of all complaints
- 2 Service brakes 18% of all complaints
- 3 Suspension 15% of all complaints
- 4 Electrical system 12% of all complaints
- 5 Engine and cooling 12% of all complaints
- 6 Powertrain 12% of all complaints
- 7 Visibility 12% of all complaints
- 8 Air bags 6% of all complaints
- Equipment: 7 complaints (21% of all).
- Service brakes: 6 complaints (18% of all), 1 of them with a crash reported by the owner.
- Suspension: 5 complaints (15% of all).
- Electrical system: 4 complaints (12% of all).
- Engine and cooling: 4 complaints (12% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4.5 L · petrol · 8 cyl
- automatic, 4-speed
Drive: RWD
Symptoms owners describe
How many of the 34 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) |
|---|---|---|---|
| Equipment | 7 | 0 | 0 |
| Service brakes | 6 | 1 | 0 |
| Suspension | 5 | 0 | 0 |
| Electrical system | 4 | 0 | 0 |
| Engine and cooling | 4 | 0 | 0 |
| Powertrain | 4 | 0 | 0 |
| Visibility | 4 | 0 | 0 |
| Air bags | 2 | 1 | 0 |
| Fuel system | 2 | 0 | 0 |
| Latches, locks, linkages | 2 | 1 | 0 |
| Structure | 1 | 0 | 0 |
| Tires | 1 | 0 | 0 |
| Wheels | 1 | 0 | 0 |
| Other | 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.
Wreck on pass side after hood came up and it was latch but came loose.
Was in a crash and the driver's side air bag didn't deploy, driver was injured, had on the cruse control .
Brake pedal went to the floor due to faulty anti lock braking system. Tt
After doing some research I have discovered that in numerous accidents the air bag failed to deploy, and injuries resulted. Additionally, I have uncovered that infiniti is aware of the problem, yet a recall was never issued.
Consumer states that the rim on the vehicle cracked prematurely, without vehicle being in an accident. Not the orginial rim of the vehcile kmc rims.please provide more info. Nlm
Intermittently, the vehicle stalls out when decelerating and the power steering disengages. This has caused almost serveral missed crashes. A technical service bulletin # fc0008624 has been issued on this situation. (letter written by father for daughter)
Sunvisors hit driver or passenger on head when going around turns. Sunvisors are not adjustable and cannot be repaired by dealer.
When switching gears from park to drive vehicle hesitates, consumer also, when traveling there is a lound noise coming from the front end, transmission slipping. Consumer has contacted the dealer, dealer stated fuel filter line needed replacing. Please provide any further details.
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 6,426 of 36,656 model years in the NHTSA data (top 18% most complained about).
On average one model year of the Q45 has 14 complaints (16 years in the data). This year has 34, above average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Other years of this model
Questions and answers
What are the most common problems with the 1991 Infiniti Q45?
Owner complaints to NHTSA most often mention: equipment, service brakes, suspension. Total complaints: 34. The most frequent symptoms in complaint texts: smoke, burning smell, fire (15%), windows, sunroof (9%), airbags did not deploy (6%).
How many service bulletins (TSB) were issued for the 1991 Infiniti Q45?
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 1991 Infiniti Q45 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 1991 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.