Infiniti is the division of the Japanese auto manufacturer Nissan, and serves as their luxury-import brand in the US and Canadian markets.

It was first introduced to the United States in 1989, to offer direct competition to the luxury lines of rival companies Toyota and Honda (Lexus and Acura, respectively). A series of Zen-inspired "rocks and trees" advertisements was part of a campaign for brand awareness, but the vehicles experienced production delays, and no cars were shown, and the ad campaign ran longer than originally planned.

Later, better advertising and award-winning models would do much to improve sales.It was the popular Q45 that lead Infiniti to take part of the luxury market. The vehicle included a class leading (at the time) 278 hp V8 engine, four wheel steering, the first active suspension system offered on a motor vehicle, and numerous interior comfort features.

Early Infinitis had unique platforms, but most are currently based on existing Nissan models. Some are spiffed up versions of existing Nissans sold in the same market, while others are rebranded models from the Japanese market where Nissan's line includes high-end luxury vehicles.

Model name designations for the Infiniti include one letter for coupes and sedans and two for SUVs with a number reflecting engine displacement. As an example, the Q45, Infiniti's flagship sedan through 2006, has a 4.5 liter engine. An "x" following the number signifies an all-wheel drive model car. Today, in addition to the US and Canada, Infiniti is marketed in Mexico, South Korea, and the Middle East, with plans to expand into Europe in 2007 and the UK in 2008.