2021 Toyota Highlander Hybrid Technical Service Bulletins

159 technical service bulletins (TSBs) are on record for the 2021 Toyota Highlander Hybrid. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10176504May 18, 2020Electrical system, Equipment. TT: To assist with the early detection and early resolution of audio related concerns, it may be requested as part of the remanufactured head unit return to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by audio suppliers, FTS, and/or FPEs.
• 10174921Apr 23, 2020Equipment. TT: Due to the challenges caused by the COVID-19 virus threat, some dealers are experiencing reduced traffic into their stores and causing dealer stock to age.
• 10174905Apr 15, 2020Electrical system. TSB: Hybrid vehicles are equipped with two types of batteries: ?Hybrid Vehicle (HV) battery ?Auxiliary (12V) battery If the hybrid vehicle is put into storage, the State-Of-Charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary.
• 10174904Apr 15, 2020Equipment. TSB: An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased.
• 10174902Apr 14, 2020Equipment. TSB: Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately.
• 10174901Apr 14, 2020Electrical system. TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As a matter of policy, Toyota does not provide battery warranty coverage for…
• 10174896Apr 9, 2020Visibility (wipers, defrost, mirrors), Lane departure. TT: The blind spot monitor (BSM) sensor angle inspection is used to confirm that the BSM sensor is within the specified angle before performing axis beam adjustment. When used in conjunction with the repair manual, these BSM tips leverage SSTs and readily available tools to support sensor angle confirmation in varying shop environments.
• 10197476May 4, 2001Equipment. Replacement vin plates.
• 10197473Jan 18, 1991Equipment. Product general information.

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