The service and repair manual for the 1991 INFINITI Q45 — the 4.5L V8 engine, 2 trims. Matched to this exact model year, so the specifications and sequences are the ones INFINITI published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1991 |
|---|---|
| Engines | 4.5L V8 — 274 cu in, DOHC |
| Trims | Base Sedan 4-Door · A Sedan 4-Door |
| Federal record | 2 recalls · 49 complaints · 13 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1991 Q45 manual
03 / ContentsSections in the manual
- Quick Lookups 71
- General Information 1,440
- Accessories & Equipment 71
- Heating, Ventilation & A/C (HVAC) 195
- Brakes 250
- Maintenance 63
- Drivelines & Axles 33
- Restraints 23
- Electrical 113
- Steering 38
- Engine Mechanical 130
- Suspension 39
- Engine Performance 484
- Transmission 141
04 / Known issuesRecalls on federal record for the 1991 Q45
- Seat Belts — front › buckle assembly · 95V103002The safety belts would not provide adequate protection to an occupant in a vehicle crash.
- Equipment — electrical › radio/tape deck/cd etc. · 98V284000This condition could result in smoke or flame and possibly the speaker catching fire.
Owners have filed 49 complaints and INFINITI has issued 13 technical service bulletins for the 1991 Q45. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1991 Q45 manual
Is this manual specific to the 1991 Q45?
Yes. It is the OEM manual matched to the 1991 model year, covering the 4.5L V8 across the Base Sedan 4-Door, A Sedan 4-Door trims. Specifications and procedure sequences are the ones INFINITI published for this year.
What 1991 Q45 problems does it help with?
2 recalls are on federal record for the 1991 Q45, covering seat belts, equipment. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by INFINITI dealers.
Does it include 1991 Q45 wiring diagrams?
Yes — the complete wiring diagrams for the 1991 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Q45 years and 1991 INFINITI models
1997 Q45 · 1996 Q45 · 1995 Q45 · 1994 Q45 · 1993 Q45 · 1992 Q45 · 1990 Q45 · all 17 years