The second generation of Jeep Wrangler was introduced for the 1997 model year. Known as the TJ, the second generation Wrangler saw the reintroduction in 2004 of the Wrangler Unlimited, which was a longer wheelbase version of the standard Wrangler. The TJ Wrangler was available with a range of inline four and inline six engines, and featured all wheel drive. Notable variants include the Sahara, Unlimited Sport Edition, and Rubicon. The Wrangler TJ was in production until 2006, and was replaced by the Jeep Wrangler JK.