For 2007, Saturn adds a new lower-priced, less-frills base model called Relay 1 and adds more standard features to the up-level Relay 3 model. The spread leaves the mid-range Relay 2 model more distinct. All models now come standard with StabiliTrak electronic stability control. The former 3.5-liter V-6 base engine has been dropped in favor of a more powerful 3.9-liter V-6 and is standard on all models. Other changes include a new 17-inch aluminum wheel design and four new exterior colors. Also, the all-wheel-drive option has been discontinued.