One problem related to sway bar has been reported for the 2004 Toyota Tacoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Tacoma based on all problems reported for the 2004 Tacoma.
Frame: I had my Tacoma in for work (the clutch would not return fully to the up position) and the dealer (tj Toyota, potsdam, NY) said there were holes in the frame. There was one on the left side near there sway bar and two on the right side just in front of the passenger door. The dealer called Toyota and Toyota said the program for undercoating the frame ended in December and they would not do anything. I bought this truck in January 2011 from the dealer (tj Toyota, potsdam NY) and they did not undercoat the frame before they sold the truck to me (with 77,500 mi). I am currently fighting with Toyota and because my truck cant pass inspection (which expires today) I can not legally drive my truck to work and there for cant work because I am a mechanic and work out of my truck.