Year of Infiniti M35
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The "M" moniker has been used on various vehicles, all being mid-size luxury cars from Nissan's Infiniti marque. This includes the M30 Coupe/ Convertible, and the M45 and M35 sedans, both of which are unrelated to the M30. This article contains info translated from the Nissan products described in the Japanese Wikipedia.
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.
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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.
The M30 was equipped with the Nissan Sonar Suspension II system that was also installed on the Maxima at the time, which featured a sonar module mounted under the front bumper that scanned the road surface and adjusted the suspension accordingly via actuators mounted on the strut towers. There was also a switch on the center console that allowed the driver to change between "Sport" and "Comfort" settings—essentially "firm" and "soft", respectively.
The M30 convertible was the sole convertible of the Infiniti line, until the Infiniti G37 convertible's introduction in 2009, . Infiniti selected about half of the models produced from 1991 to 1992 and had them made into convertibles by the ASC (American Sunroof Corporation). While the power tops on these did not need extensive maintenance for quite a while, they could be operated manually if necessary. All M30 coupes had power tilting/ sliding sunroofs standard, with "auto-cut" while sliding to the closed position to prevent anything from getting caught.
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