Another feature adopted from the M sedan and used in the 2006 Infiniti Q45 is a five-speed, manually interactive automatic transmission. Engineers have added a rev-matching feature that blips the throttle when the manual shift mode is being used. When downshifting, for instance, that blip of the throttle will raise the engine speed, or rpm, to the appropriate level for the lower gear. The result is a smooth transition between gears while using the manual mode of the transmission. This feature is standard on all Q45 models.