The flagship of Nissan's luxury brand gets a mild facelift and some equipment revisions for 2005. The Q45 has a 340-hp V8 and a 5-speed automatic transmission with manual shift gate. Recalibrations to the transmission for '05 are intended to improve response and smoothness. ABS and antiskid/traction control are standard, as are front side airbags and head-protecting curtain side airbags. A driver-adjustable suspension is also standard. A dashboard screen shows audio, climate, and trip-computer functions; it also serves as the display for the standard navigation system and, when the transmission is in Reverse, a rearview TV camera. Q45 has voice control for audio, climate, and navigation functions.

A Premium package adds heated and cooled front seats, reclining heated rear seats, satellite radio, and 18-inch wheels in place of standard 17s. It also includes radar cruise control designed to maintain a set following distance from other traffic.