I just got a call from Toyota making me aware of this if you are struggling with rust.
Campaign Number E0D
Limited Service Campaign E0D (Specific 20 Cold Climate States Only) - Certain 2005-2008 Model Year Tacoma Vehicles - Corrosion-Resistant Compound Application to the Vehicle's Frame
This is a Limited Service Campaign (LSC). Please contact an authorized Toyota Dealer and make an appointment to have your vehicle inspected and the CRC application completed before 3/31/2016. This campaign covers vehicles currently registered in CT DE IL IN KY MA MD ME MI MN NH NJ NY OH PA RI VA VT WI WV & D.C. This LSC will be launched in Phases. Currently only dealers in MA, ME, NH, RI, & VT are authorized to perform this campaign
Condition: Certain 05-08 MY Tacoma vehicles operated in specific cold climate areas with high road salt use, may exhibit more than normal corrosion to the frame. An authorized dealer will inspect the frame. If significant rust perforation is not found*, corrosion-resistant compounds (CRC) will be applied to key areas of the frame. If an authorized dealer confirms the frame has significant rust perforation*, an appropriate remedy will be provided.
*Based on Toyota's Criteria