Two problems related to transmission fluid leaking have been reported for the 2004 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Highlander based on all problems reported for the 2004 Highlander.
My 2004 Toyota Highlander limited v6 developed substantial transmission/ transaxle leak at 56,000 miles. Transmission fluid was able to leak into the front transaxles and then onto the ground. Toyota is aware that the #2 axel seal is at fault as it is well reported. The repair was over $2,000. I fixed mine, but am concerned about those that won't be fixed. I am concerned that if the transmission leaks out in total would the resulting transmission failure result in injury.
2004 Toyota Highlander with awd and 4 cyl. Vehicle is leaking transmission fluid at 67,500 miles. Dealership say that Toyota will not help with this problem as it as the warranty expired at 60,000 miles. I bought this vehicle due to the expected reliability of a Toyota product, but it appears that Toyota does not stand behind their product. My other vehicle is a Lexus RX 300 which I love, but I will be hard pressed to buy another Toyota product in the future after this experience.