years. The Tacoma's popularity only increased in the next few years. By 2004, it was ahead of the Nissan Frontier, and Dodge Dakota, but still 2.2% behind in sales to the Ford Ranger. In 2008, Toyota proactively announced a 15-year, unlimited-mileage corrosion warranty for 1995–2000 model years due to inadequate rustproofing and frame corrosion issues affecting over 800,000 Tacomas. Toyota will either repair the frame or buy back the truck for 1.5 times its KBB retail value. This was later extended to include 2001–2004 model years, but in these cases when a frame was found to be rusty to the point of perforation, the frame is replaced with a new one instead of a buy back. It is suspected that inadequate drainage in the fully-boxed frame may have trapped moisture, leading to corrosion. The second-generation Tacoma moved to a frame with open C-section rails instead. On November 21, 2012, Toyota recalled about 150,000 Tacoma midsize pickup trucks from the model years 2001 to 2004 that were sold primarily in 20 cold-weather U.S. states. The recall involves the spare tire and how it could fall off. Second generation (N220/N240/N250/N260/N270; 2004) In 2000, Toyota began development of the second generation Tacoma under chief engineer Chikuo Kubota. The majority of development work was handled by Hino in Japan. Designers Shigeya Hattori and Hideo Karikomi of Hino, won the internal design competition in 2001. Final designs were frozen for production in 2002 and patents filed on July 3, 2003, with test mules being tested from early 2003. Prototypes were built later in 2003, with development ending in the second quarter of 2004. On February 4, 2004, at the Chicago Auto Show, Toyota unveiled a bigger and more powerful Tacoma. Launched on October 18, 2004 as a 2005 model, this new Tacoma was available in eighteen different combinations of three cab configurations, four transmissions, two engines, and two bed lengths. Updates The 2006 model Tacoma was a bit different from the 2005 model. The 2006 model made some options standard. Toyota also added 2 new interior colors for the 2007 model year. 2008 models are carry-ons from 2007. For 2009 safety features were added and the Tacoma no longer offers a mechanical limited slip differential rather an open differential which uses individual wheel braking to simulate a mechanical LSD or "Auto-LSD". TRD off-road models continue to come equipped with a locking rear differential. A minor