One problem related to automatic transmission cooler has been reported for the 2001 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota Sienna based on all problems reported for the 2001 Sienna.
Consumer took vehicle for a oil change to dealership. Mechanic dicovered a oil leak underneath vehicle oil pan gasket and a leaking bolt and seal. Engine needs a seal replacements. Also, there is a transmission leak. Front brakes are grinding metal to metal. Dealership is aware of the problems.