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2004 Mercury Grand Marquis GS

The 2004 Mercury Grand Marquis GS is a 224-hp 4.6-liter V8 with a 4-speed automatic and rear-wheel drive. It starts at $24,370 MSRP and is rated at 18 mpg combined.

It makes 224 horsepower. EPA fuel-economy estimates are 15 mpg city and 23 mpg highway (18 mpg combined).

The Grand Marquis measures 212.0 inches long on a 114.4-inch wheelbase and has a curb weight of 3,957 lb.

Spec Value
Vehicle
Body TypeSedan
PowertrainGas
Price
MSRP$24,370 ($41,928 *)
MSRP with Destination$25,095 ($43,176 *)
Destination Charge$725
Engine
Engine Type4.6-liter 224-horsepower V8, naturally aspirated
Displacement4.6 L
Horsepower224 hp
ValvetrainOHC V8
Injection TypeFuel injection
Drivetrain
Drive TypeRear-Wheel Drive
Transmission
Transmission4-speed automatic (4R70W)
1st Gear2.84
2nd Gear1.55
3rd Gear1
4th Gear0.7
Reverse2.32
Fuel Economy
City15 MPG
Highway23 MPG
Combined18 MPG
Recommended FuelRegular unleaded
Tank Capacity19 gal
Tires & Wheels
Wheels Front16 in
Wheels Rear16 in
Tires FrontP225/60TR16
Tires RearP225/60TR16
Dimensions & Weight
Length212 in
Width77.8 in
Height56.8 in
Wheelbase114.4 in
Cargo Volume21 ft³
Curb Weight3,957 lbs
Interior
Headroom Front39.5 in
Headroom Rear37.8 in
Legroom Front41.6 in
Legroom Rear38 in
Shoulder Room Front60.6 in
Shoulder Room Rear60 in
Hip Room Front57.4 in
Hip Room Rear56.1 in
* Amount adjusted for inflation to 2026 dollars

Safety & Recalls

NCAP safety ratings

Overall Not rated
Frontal crash Not rated
Frontal – driver ★★★★★
Frontal – passenger ★★★★★
Side crash Not rated
Rollover Not rated
Tested variant: 2004 Mercury Grand Marquis 4-DR. w/SAB
Other tested variants (1)
  • 2004 Mercury Grand Marquis 4-DR.: overall not rated

Recalls

2 recalls on file with NHTSA for the 2004 Mercury GRAND MARQUIS. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.

Dec 22, 2015 · EXTERIOR LIGHTING:HEADLIGHTS

Ford Motor Company (Ford) is recalling certain model year 2003-2005 Ford Crown Victoria and Mercury Grand Marquis vehicles manufactured October 3, 2001, to August 2, 2005. The affected vehicles have a lighting control module (LCM) that may fail, resulting in a loss of headlights.

Consequence: A loss of headlights can reduce driver visibility and increase the risk of a crash.

Remedy: Ford will notify owners, and dealers will replace the LCM, free of charge. The recall began April 14, 2017. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 15S39.

NHTSA campaign 15V861000

Jun 13, 2006 · FUEL SYSTEM, GASOLINE

CERTAIN AFTERMARKET FUEL FILTERS SOLD UNDER THE PUROLATOR BRAND NAME, P/N F65277, SHIPPED FROM JANUARY 16 THROUGH JUNE 2, 2006, FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. DUE TO INCORRECT DESIGN, THE QUICK CONNECTORS MAY NOT FULLY SEAT WITH THE TUBE INTERFACE, EVEN THOUGH THE PERSON MAKING THE CONNECTION MAY BELIEVE THAT THE QUICK CONNECTOR IS FULLY ATTACHED.

Consequence: FAILURE OF THIS CONNECTION COULD LEAD TO FUEL SPILLAGE AND, IN THE PRESENCE OF AN IGNITION SOURCE, A FIRE COULD OCCUR.

Remedy: UFI WILL NOTIFY OWNERS AND REPLACE THE FILTERS FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 4, 2006. OWNERS MAY CONTACT UFI FILTERS USA AT 800-230-5876.

NHTSA campaign 06E056000

360 owner complaints to NHTSA for the 2004 Mercury GRAND MARQUIS

Owner Complaints

360 owner complaints filed with NHTSA for the 2004 Mercury GRAND MARQUIS (17 mention a crash, 4 a fire, 9 an injury). See all on nhtsa.gov

Most-cited areas
Exterior Lighting214
Steering69
Electrical System43
Vehicle Speed Control23
Engine And Engine Cooling10
Power Train9
A complaint can cite more than one area.
Most recent complaints
Aug 24, 2026 · Exterior Lighting
“The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at an undisclosed speed, a local Police Officer stopped the vehicle and made the contact aware that both taillights…”
Aug 29, 2025 · Exterior Lighting
“The contact owns a 2004 Mercury Grand Marquis. The contact received NHTSA Campaign Number: 15V861000 (Exterior Lighting). The contact stated that while driving at night, the headlights were flickering…”
Aug 4, 2025 · Electrical System
“The contact owns a 2004 Mercury Grand Marquis. The contact stated that while the vehicle was parked, the key fob became inoperable. The contact was not able to start the vehicle with the security…”
Jul 2, 2025 · Electrical System, Exterior Lighting, Service Brakes
“Auto lights stopped working. Tail lights will not come on”
Jun 26, 2024 · Exterior Lighting
“The contact owns a 2004 Mercury Grand Marquis. The contact stated while driving at an undisclosed speed at night, he became aware that the headlights were not functioning properly. No warning lights…”

Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.

Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2004 MERCURY GRAND MARQUIS. US-market vehicles only; data cached for up to 7 days.

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