One problem related to bumper has been reported for the 2001 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota 4Runner based on all problems reported for the 2001 4Runner.
Rear bumper rusting through from the inside out. Dealer says the result of poor welds on the bumper brackets. Vehicle has 5 year rust through warranty that dealer and company will not honor on the bumper, only on sheet metal.