Two problems related to rear suspension springs have 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.
My 2004 Tacoma has ~127,500 miles and has been subject to frame corrosion and spare tire retainer corrosion recalls. My dealer recently advised that the left rear leaf spring is broken which is resulting in an unpredictable response when driving, especially in 4wd in snowy weather. This lack of steering control is a safety issue. I believe this fracture is directly linked to the corrosion issues in the Tacoma frame and suspension design on the Tacoma. Toyota USA has reviewed the case and is unwilling to cover the cost of the leaf spring repairs. This is despite an extensive recall on 2005+up Tacoma's for distressed leaf springs.
Frame is perforated due to rust just in front of rear axle on both sides of vehicle. About a 1. 5" x 6" hole on driver's side with a fracture of about 12" going toward rear axle. Passenger side has a fracture about 18" long in same area. Rear suspension mounts and springs are compromised. Toyota had a program to deal with issue but deadline had passed by the time I purchased vehicle. Dealer told me Toyota had checked out frame issue and it passed. According to Toyota I was misinformed. Toyota will not fix what is obviously a manufacturing defect that I never had the opportunity to deal with properly. Body and bed are rust free and in excellent condition. I paid 11,700 for the truck with 88,000 mi. , have owned it for one year and put approx. 9,000 miles on it. It is unsafe to drive and for all intents and purposes totaled.