One problem related to transmission fluid leaking has been reported for the 2020 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Toyota Sienna based on all problems reported for the 2020 Sienna.
Purchased rental program vehicle and immediately had vehicle serviced at the dealership. Received a phone call from service advisor that automotive technician had found a mechanical problem. It was stated that a hose had come loose/apart in the axle and fluid was leaking. Now, we had purchased vehicle day before and the following day dropped vehicle for service at dealership. As a consumer, I need a maintenance baseline. The brief time driving the vehicle, there was no visible/audible clue that mechanical issue was present. Exact description of warranty work performed [driver side front axle assembly, axle coming apart internally] replaced driver side front axle assembly. Fortunately, vehicle was being serviced and this component did not fail while in motion.
| Transmission Fluid Leaking problems | |
| Power Train problems |