One problem related to brake light on has been reported for the 2003 Toyota Tacoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Tacoma based on all problems reported for the 2003 Tacoma.
I purchased a 2003 Toyota Tacoma. I have had a problem with the brake light coming on in the winter. When I press the brake the first time the light stays on until the truck warms up; then goes out. I took the truck to Toyota and they couldn't find a problem. Now the light is periodically coming up and staying on a couple of minutes in the warm weather. I again took it to Toyota and they again couldn't find a problem.