The fifth-generation Quattroporte debuted on September 9, 2003, at the Frankfurt Motor Show and made its American premiere at the 2003 Pebble Beach Concours d'Elegance; production began in 2003. The exterior and interior were designed by Ken Okuyama, then Pininfarina's chief designer. The last Quattroporte was built on December 20, 2012.

Built on an entirely new platform, the M139, it was 50 cm (19,7 in) longer than its predecessor and had a 40 cm (15,7 in) longer wheelbase. The same architecture would later form the basis for the GranTurismo and GranCabrio coupes and convertibles.

Initially, the Quattroporte was powered by an evolution of the naturally aspirated 4,2-liter dry-sump V8 engine used in the Maserati Coupe, with an increased power output of 400 hp (294 kW; 395 PS) and a new black plastic intake manifold instead of a cast aluminum one. Due to its increased weight compared to the Coupe and Spyder, the Quattroporte accelerates from 0 to 100 km/h (0 to 62 mph) in 5,2 seconds, and has a top speed of 275 km/h (171 mph).

History
2003-2008
The Maserati Quattroporte was initially offered in only one configuration, equipped with an automated manual transmission, marketed as the DuoSelect. The base Quattroporte DuoSelect model featured a chrome grille with horizontal slats, adaptive suspension (marketed as the Skyhook), and 330 mm brake discs with four-piston calipers per wheel. Maserati offered fifteen exterior colors, Poltrona Frau leather upholstery in ten colors, contrasting seat upholstery and stitching, and three types of wood inlays.

In 2004, the American luxury department store Neiman Marcus offered a limited edition Quattroporte, available only through the 2004 Christmas catalog, for a price of $125.000. Each of the 60 Neiman Marcus Quattroportes was finished in Bordeaux Pontevecchio (wine red) and featured a chrome grille with side vents and 19-inch polished wheels. The interior was upholstered in ivory Poltrona Frau leather, accented with Bordeaux piping and mahogany wood accents.

At the IAA in Frankfurt in September 2005, Maserati introduced two different trim levels for the Quattroporte: the Executive GT and the Sport GT

This Quattroporte presented here is a Japanese-supplied version in light blue metallic, a color that suits the car exceptionally well. The interior is upholstered in gray leather and features all the extras offered by these highly exclusive cars. It sits on beautiful 9-spoke alloy wheels. The car has been meticulously maintained and is virtually indistinguishable from new. This Maserati has only 45.581 km on the odometer and feels like new. Naturally, all the manuals are included. Under the hood, you'll find a nearly new engine. For anyone looking for a stunning Quattroporte, this is the car!