One problem related to brake fluid leak 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.
The rear brake lines that connect over the rear axle rusted into and caused the brake fluid to leak from the braking system. When the truck was taken into a local service center for repair to the brakes the service center representative informed me that they could not repair the brake lines because the frame was rusted so severely that if put on a lift the frame would fall apart and the truck would break in half. The service center determined also the truck was not safe to drive. Service records at the dealership are on file where the truck was taken to the dealership for inspection of the frame and reported the truck did not have a rust issue as described in the letters I received and heeded the warning to have the truck inspected.