Toyota Repair Problems? Ask a Mechanic for Answers ASAP
Yes, there is a Service Bulletin on this and it covered all Tacoma's from 1997-2004. (Geez, you'd think they could fix a known water leak in 7 years!) Here is the Bulletin for the parts and procedure for the fix....
It will happen on either side and it may be best to let the Dealer fix this one for you.