The Infiniti M30 (chassis code F31) was a 2-door luxury GT coupe introduced with the Q45 as the start of the Infiniti line in 1990, as a stopgap until other models could be produced. The M30 was basically a Japanese Nissan Leopard built with left-hand drive and rebadged as an Infiniti, and had added luxury features. The other main changes were in the engine, transmission and suspension. The M30 was only sold in the United States.
The M30 had no factory options, but dealers offered the addition of a cellular phone and a CD player/changer. The sole engine was Nissan'sVG30E, a 3.0 L SOHC V6 that produced 162 hp (121 kW) and 180 ft·lbf (244 N·m) of torque, also used by many previous Nissan models such as the Maxima and 300ZX. Like the 300ZX, the M30 was a front-engined and rear-wheel drive vehicle. The transmission was an RE4R01A, four-speed automatic with overdrive, as enabled or disabled by a button on the shifter. There was no option of a manual transmission. The differential was a Nissan R200-type open differential. It is generally regarded among M30 enthusiasts that the change of powertrain, weak suspension and the lack of options in these categories was a serious mistake on Infiniti’s part, and perhaps to blame for the lackluster sales. The M30 (coupe)has a stock weight of 3333 lb (1540 kg), yet only 162hp (121kW), creating an inadequate power to weight ratio for the intended image of a sport coupe. Unsurprisingly, the M30 convertible weighed even more, due to massive amounts of body and chassis reinforcements, but this is regarded as a good thing to some, because the chassis is noticeably stiffer than it is on the coupes. In addition, sports cars normally come with a manual transmission standard and have the option of an automatic. Instead, Infiniti didn't even give potential buyers the choice, as all M30s had the four-speed automatic.