Toyota Transaxle Whine
Some 2017-2018 Toyota Highlander and Sienna vehicles may exhibit a whine noise while driving, a harsh shift, MIL on and/or reduced power. The following DTCs may be present:
For transaxles that fall within a specific date range, a remanufactured transaxle is available. Confirm the transaxle serial number. If it begins with 7A6 and comes before 7A617E03416, this bulletin applies.