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Home/Registry/Mercury/Grand Marquis/1998–2011supermotors.net/registry/mercury/grand-marquis/1998-2011

1998-2011 Mercury Grand MarquisAero Panther Grand Marquis (1998-2011)

1998–2011 13 on the wall 85 documents ↓

The Mercury Grand Marquis (1998-2011) is a full-size, rear-wheel-drive sedan built on Ford's body-on-frame Panther platform and sold only as a four-door sedan. Every year used the 4.6 liter SOHC modular V8 paired with a four-speed automatic, and the car shared its platform with the Ford Crown Victoria and Lincoln Town Car. The 1998 revision brought a restyled body while the steering stayed recirculating-ball, the 2003 update introduced a revised hydroformed frame together with rack-and-pinion steering, and production ended at St. Thomas Assembly in Ontario, Canada on January 4, 2011.

Other Mercury Grand Marquis generations

1975-1981 Mercury Grand Marquis 1982-1991 Mercury Grand Marquis 1992-1997 Mercury Grand Marquis

Platform and chassis

The Mercury Grand Marquis (1998-2011) used the Ford Panther platform, a body-on-frame, rear-wheel-drive architecture shared with the Ford Crown Victoria and the Lincoln Town Car. The 1998 model year was primarily a restyle; the steering remained recirculating-ball until the 2003 update. Suspension used a short/long-arm front and a live rear axle located by a Watt's linkage, a feature carried across the whole generation. The 2003 model year introduced a substantially revised chassis with a hydroformed front frame section, rack-and-pinion steering in place of the older recirculating-ball system, larger brakes, and revised front and rear suspension.

Engine

The Grand Marquis used a single engine family across 1998-2011: the 4.6 liter (281 cubic inch) SOHC modular V8. Output depended on exhaust configuration, with the standard single-exhaust rating rising from 200 net horsepower (1998-2000) to 220 (2001-2002) and 224 (2003-2011), and the dual-exhaust versions, offered with the handling and performance package, rated higher at 215, 235, and 239 horsepower over the same spans. The 2003 revision updated the engine's electronics and induction (knock sensor, returnless fuel system) and raised the standard rating. Torque ranged from about 265 to 287 lb-ft depending on year and exhaust.

  • 4.6 L SOHC V8, single exhaust: the base configuration for GS and LS trims, rated 200 to 224 horsepower depending on year.
  • 4.6 L SOHC V8, dual exhaust: higher-output version bundled with the handling and performance package, rated 215 to 239 horsepower depending on year.

Transmission

All Mercury Grand Marquis (1998-2011) models used a four-speed automatic transmission: the 4R70W, later revised to the 4R75W in the mid-2000s. Drive went to the live rear axle.

Body styles

The Grand Marquis was offered only as a four-door, full-size sedan throughout 1998-2011. It seated six with a front bench and column shifter on most trims.

Year-by-year notable changes

  • 1998: restyled body; steering remained recirculating-ball (rack-and-pinion arrived in 2003).
  • 2001: Performance Improved (P.I.) cylinder heads and intake raised output to 220 hp single exhaust and 235 hp dual exhaust.
  • 2003: revised chassis with a hydroformed frame section, rack-and-pinion steering replacing the recirculating-ball setup, larger brakes, and an updated 4.6 L V8 with a higher standard rating (224 hp single, 239 hp dual).
  • Late run (roughly 2008-2011): the model line was narrowed, leaning toward fleet and limited retail sale as full-size sedan demand fell.
  • 2011: final production year; the last car was built at St. Thomas Assembly in Ontario, Canada on January 4, 2011, closing out the Grand Marquis nameplate and the Mercury brand.

Trims and variants

  • GS: the base trim, typically with the single-exhaust 4.6 L V8 and bench seating.
  • LS: the upper trim, adding equipment and available with the handling and performance package.
  • LSE: a sport-oriented version offered roughly 2001-2003 and again in 2005, pairing the handling and performance package (dual exhaust, firmer suspension, floor console and shifter) with distinct trim.
By the SuperMotors Editorial Team · Last updated July 2026 · Spotted an error? Suggest a correction

Asked all the time

What engine does the 1998-2011 Mercury Grand Marquis use?

Every 1998-2011 Grand Marquis uses the 4.6 liter (281 cubic inch) SOHC modular V8 with a four-speed automatic. Single-exhaust cars were rated 200 horsepower (1998-2000), 220 (2001-2002), and 224 (2003-2011), while dual-exhaust versions bundled with the handling package were rated higher at 215, 235, and 239 horsepower over the same spans.

What changed in the 2003 Grand Marquis?

The 2003 model year brought a revised chassis with a hydroformed front frame section, rack-and-pinion steering in place of the older recirculating-ball system, larger brakes, and an updated 4.6 liter V8 whose standard rating rose to 224 horsepower.

How is the Grand Marquis different from the Ford Crown Victoria?

The Mercury Grand Marquis and Ford Crown Victoria are siblings on the same Panther platform with the same 4.6 liter V8 and four-speed automatic. The differences are mainly styling, trim, and equipment. The Crown Victoria was also sold heavily as a police and fleet car, while the Grand Marquis was positioned as the more retail, comfort-oriented sedan alongside the Lincoln Town Car.

Which years should a buyer look for?

Buyers wanting the updated chassis and higher standard engine output should look at 2003 and later cars, which received the hydroformed frame, rack-and-pinion steering, and the revised 4.6 liter V8 rated at 224 horsepower standard. Cars with the handling and performance package add dual exhaust (up to 239 horsepower) and a firmer suspension.

When did Grand Marquis production end?

Production of the Mercury Grand Marquis ended at Ford's St. Thomas Assembly plant in Ontario, Canada on January 4, 2011. The final car was also the last Mercury ever built, closing out the nameplate along with the related Ford Crown Victoria.

What is the LSE?

The LSE was a sport-oriented Grand Marquis offered roughly 2001-2003 and again in 2005. It bundled the handling and performance package, including the dual-exhaust higher-output 4.6 liter V8, a firmer suspension, and a floor console and shifter, with distinct interior and exterior trim.

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Wiring Diagrams (3)

Service Procedures (4)

Brochures & Literature (49)

Data/Spec Plates (15)

Fuse & Relay Charts (1)

Exploded Parts (3)

Vacuum Routing (1)

Manual Pages (6)

Schematics (3)

The wall · registered 1998–2011 Grand Marquiss

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