nfiniti is a luxury brand of Japanese automaker Nissan Motor Co., Ltd. It serves as Nissan's luxury brand in the American, Canadian, Mexican, Middle Eastern, South Korean and Taiwanese markets. Nissan also has plans to release Infiniti into many European markets (Russia & Ukraine in 2007, Germany & United Kingdom in 2008), China (10 dealerships by 2007), as well as in Japan sometime after 2008.

All current Infiniti coupes, sedans and crossovers are based on the Nissan FM platform. The center of the engine is placed behind the front wheels. This placement makes weight distribution more even, which is intended to improve braking, acceleration, and handling. It also reduces the polar moment of inertia. The only exception is the QX56 full-size SUV, which rides on the Nissan F-Alpha platform.

Infiniti's model name designation includes one letter for coupés and sedans (two letters for SUVs) and a number reflecting engine displacement. For example, the QX56 is an SUV featuring a 5.6 L engine. An exception to this was the QX4 SUV, which featured a 3.3 L engine (1997-2000) and later a 3.5 L engine (2001-2003). An 'x' following the engine displacement of Infiniti sedans denotes an all wheel drive model (e.g. Infiniti G35x).