The service and repair manual for the 2003 INFINITI Q45 — the 4.5L V8 engine, 3 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 | 2003 |
|---|---|
| Engines | 4.5L V8 — 274 cu in, DOHC |
| Trims | Premium Sedan 4-Door · Base Sedan 4-Door · Convenience Sedan 4-Door |
| Federal record | 1 recall · 20 complaints · 40 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2003 Q45 manual
03 / ContentsSections in the manual
- Quick Lookups 524
- General Information 1,986
- Accessories & Equipment 1,806
- Heating, Ventilation & A/C (HVAC) 259
- Body & Frame 733
- Maintenance 28
- Brakes 115
- Restraints 152
- Drivelines & Axles 80
- Steering 115
- Electrical 1,656
- Suspension 105
- Engine Mechanical 331
- Transmission 533
- Engine Performance 1,500
- Operate engine for at least 10
04 / Known issuesRecalls on federal record for the 2003 Q45
- Air Bags — side/window · 12V079000Non-deployment of side air bags could increase the risk of personal injury.
Owners have filed 20 complaints and INFINITI has issued 40 technical service bulletins for the 2003 Q45. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2003 Q45 manual
Is this manual specific to the 2003 Q45?
Yes. It is the OEM manual matched to the 2003 model year, covering the 4.5L V8 across the Premium Sedan 4-Door, Base Sedan 4-Door, Convenience Sedan 4-Door trims. Specifications and procedure sequences are the ones INFINITI published for this year.
What 2003 Q45 problems does it help with?
1 recall is on federal record for the 2003 Q45, covering air bags. 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 2003 Q45 wiring diagrams?
Yes — the complete wiring diagrams for the 2003 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 2003 INFINITI models
2006 Q45 · 2005 Q45 · 2004 Q45 · 2002 Q45 · 2001 Q45 · 2000 Q45 · 1999 Q45 · 1998 Q45 · 1997 Q45 · all 17 years
2003 INFINITI FX35 · 2003 INFINITI FX45 · 2003 INFINITI G35 · 2003 INFINITI I35 · 2003 INFINITI M45 · 2003 INFINITI QX4 · every 2003 model