Jeep Wrangler Unlimited 4WD is a four-wheel drive, mid-size SUV produced by Jeep. It is the four-door version of the Jeep Wrangler, a popular off-roader. The Unlimited 4WD has a longer wheelbase and more interior room than the two-door model. It is offered in a wide range of trim levels, including Rubicon, Sahara, and Sport.