The Infiniti Q45 is a full-size luxury car sold by Nissan's Infiniti marque from 1990 until 2006. It is a rear wheel drive, four door sedan powered by a V8 engine. Early generations were based on the automaker's Japanese-market flagship sedan, the Nissan President, while models produced after 1997 were based on the slightly smaller Nissan Cima.
Exports of the Q45 ceased after 2006, but the Cima continued to be sold domestically until August 2010. The Q45 competed directly with the Lexus LS, as well as the higher-priced BMW 7 Series, and Mercedes-Benz S-Class.