One problem related to brake pedal and linkage has been reported for the 2004 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota 4Runner based on all problems reported for the 2004 4Runner.
Break pedal vibrates every other time it is pressed down. It makes no difference how hard you press. It goes away after few seconds. It is not an abs related vibration.