The service and repair manual for the 2003 Mercury Grand Marquis — the 4.6L V8 engine, 3 trims. Matched to this exact model year, so the specifications and sequences are the ones Mercury published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2003 |
|---|---|
| Engines | 4.6L V8 — SOHC |
| Trims | GS Sedan 4-Door · LS Sedan 4-Door · LSE Sedan 4-Door |
| Federal record | 1 recall · 449 complaints · 88 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2003 Grand Marquis manual
03 / ContentsSections in the manual
- Quick Lookups 110
- General Information 1,667
- Accessories & Equipment 952
- Heating, Ventilation & A/C (HVAC) 181
- Body & Frame 331
- Maintenance 73
- Brakes 224
- Restraints 570
- Drivelines & Axles 88
- Steering 97
- Electrical 382
- Suspension 102
- Engine Mechanical 350
- Transmission 339
- Engine Performance 2,012
- Radiator Cap Pressure 16
04 / Known issuesRecalls on federal record for the 2003 Grand Marquis
- Exterior Lighting — headlights · 15V861000A loss of headlights can reduce driver visibility and increase the risk of a crash.
Owners have filed 449 complaints and Mercury has issued 88 technical service bulletins for the 2003 Grand Marquis. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2003 Grand Marquis manual
Is this manual specific to the 2003 Grand Marquis?
Yes. It is the OEM manual matched to the 2003 model year, covering the 4.6L V8 across the GS Sedan 4-Door, LS Sedan 4-Door, LSE Sedan 4-Door trims. Specifications and procedure sequences are the ones Mercury published for this year.
What 2003 Grand Marquis problems does it help with?
1 recall is on federal record for the 2003 Grand Marquis, covering exterior lighting. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mercury dealers.
Does it include 2003 Grand Marquis 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 Grand Marquis years and 2003 Mercury models
2009 Grand Marquis · 2008 Grand Marquis · 2007 Grand Marquis · 2006 Grand Marquis · 2005 Grand Marquis · 2004 Grand Marquis · 2002 Grand Marquis · 2001 Grand Marquis · 2000 Grand Marquis · 1999 Grand Marquis · 1998 Grand Marquis · 1997 Grand Marquis · all 30 years
2003 Mercury Marauder · 2003 Mercury Mountaineer · 2003 Mercury Sable · every 2003 model