The service and repair manual for the 1991 Mercury Grand Marquis — the 5.0L V8 engine, 2 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 | 1991 |
|---|---|
| Engines | 5.0L V8 — OHV |
| Trims | GS Sedan 4-Door · LS Sedan 4-Door |
| Federal record | 2 recalls · 106 complaints · 40 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1991 Grand Marquis manual
03 / ContentsSections in the manual
- Quick Lookups 67
- General Information 1,479
- Accessories & Equipment 255
- Heating, Ventilation & A/C (HVAC) 280
- Body & Frame 77
- Maintenance 134
- Brakes 121
- Restraints 89
- Drivelines & Axles 60
- Steering 91
- Electrical 183
- Suspension 105
- Engine Mechanical 140
- Transmission 150
- Engine Performance 847
04 / Known issuesRecalls on federal record for the 1991 Grand Marquis
- Air Bags — frontal · 90E043001Inflator component separation allows hot combustion gases to escape into the passenger compartment w.
- Power Train — automatic transmission · 91V048000If park is not engaged and the parking brake is off, avehicle roll-away could result.
Owners have filed 106 complaints and Mercury has issued 40 technical service bulletins for the 1991 Grand Marquis. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1991 Grand Marquis manual
Is this manual specific to the 1991 Grand Marquis?
Yes. It is the OEM manual matched to the 1991 model year, covering the 5.0L V8 across the GS Sedan 4-Door, LS Sedan 4-Door trims. Specifications and procedure sequences are the ones Mercury published for this year.
What 1991 Grand Marquis problems does it help with?
2 recalls are on federal record for the 1991 Grand Marquis, covering air bags, power train. 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 1991 Grand Marquis 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 Grand Marquis years and 1991 Mercury models
1997 Grand Marquis · 1996 Grand Marquis · 1995 Grand Marquis · 1994 Grand Marquis · 1993 Grand Marquis · 1992 Grand Marquis · 1990 Grand Marquis · 1989 Grand Marquis · 1988 Grand Marquis · 1987 Grand Marquis · 1986 Grand Marquis · 1985 Grand Marquis · all 30 years
1991 Mercury Capri · 1991 Mercury Colony Park · 1991 Mercury Cougar · 1991 Mercury Sable · 1991 Mercury Topaz · 1991 Mercury Tracer · every 1991 model