One problem related to sun roof has been reported for the 2001 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota Highlander based on all problems reported for the 2001 Highlander.
Sun roof leaking even with sunroof completely closed. Seems to be no drain lines from drain holes in sunroof compartment. Water drains into car well on passenger well in front of car. Also have had wind noise coming from left area of car- thought it might be the roof rack. Dealership check out & could not find noise. They also removed left panel of car around windshield and wheel well to look for noise.