Vehicle Overview Infiniti is Nissan’s luxury brand, and the QX4 is a dressed-up Nissan Pathfinder. The QX4 was carried over until March, when the 2001 model went on sale with a 3.5-liter V-6 engine, an exterior facelift and new interior features, including an optional navigation system. QX4 rivals include the Mercedes-Benz M-Class, Lexus RX300 and Jeep Grand Cherokee.
