-In 2004, a Tire Pressure Monitoring System was added as standard equipment. A 3rd row seat became optional on the SR5 and Limited models.
-The 2005 model brought enhancements to the optional V8 engine and made a 5-speed automatic standard on the V6 model. Slight changes were made to the exterior including color-keyed bumper trim (replacing the silver painted trim on all colors except Dorado Gold) on the SR5 and Limited; a chrome grille on the SR5; a black roof-rack and running boards (replacing silver) on the Limited; and a redesigned rear spoiler. A Salsa Red Pearl scheme was also introduced for all trim levels, although a similar color scheme was available for third generation models.
Facelifted Toyota 4Runner Sport Edition 4WD (US)
-The 2006 model year marked the fourth generation's mid-cycle refresh. The changes included revised front and rear bumpers; a reworked grille; new projector-beam headlamps and LED tail lamps; additional chrome trim on the SR5 model; and a smoked-chrome grille with tubular roof-rack and step bars on the Sport Edition. The revised front bumper features circular fog lights and a relocation of the turn-signals to the headlamp assembly. The redesigned bumper eliminates the rear bumper reflectors. MP3 playback capability and an auxiliary input jack were added to all audio systems. In addition, the Limited model was further differentiated from the other trim levels with the addition of unique 18" wheels and a seat memory system.
http://en.wikipedia.org/wiki/Toyota_...2.80.932009.29