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Service bulletins for the 2018 Toyota Sienna

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

300 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
T-SB-0192-172018-04-02. Service bulletin. TIRES. TSB: During the manufacturing process, tires are mounted on the vehicle as matched sets to help reduce conditions such as pulling or drifting. If the wheels are replaced or refinished before vehicle delivery, it is important the tires remain on the vehicle in the same location and in the same direction of rotation. Refer to the following procedure to ensure that the original tires stay in the same location on the vehicle.
T-SB-0304-17_Rev2018-04-02. Service bulletin. EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, and T-SB-0144-08. Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, and T-SB-0144-08 are obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. REVISION NOTICE January 11, 2018 ? The Supersession Notice has been updated. Any previous printed versions of this bulletin should be discarded. Vehicle replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) may be available from Toyota, provided the request meets one of the criteria listed in this Service Bulletin.
Toyota Safety Re2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements
H0X_Toyota Safet2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements.
T-TT-0474-182018-04-02. Service bulletin. POWER TRAIN. TT: For some repairs on 2017-2018 Sienna and Highlander and 2018 Camry vehicles equipped with the 8-speed transmission, it is necessary to determine transmission serial number and understand production date.
Toyota Safety Re2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements
T-TT-0472-17_Rev2018-03-12. Service bulletin. EQUIPMENT. TT: Some customers may experience an inoperative Entune Apps Suite and Scout moving maps when connecting an Apple device with iOS version 11.2.1 - 11.2.5 via USB tethering.
Toyota Safety Re2018-03-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements.
Toyota Safety Re2018-03-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements.
T-TT-0484-182018-03-12. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low. These settings may need to be reapplied any time the phone is paired to a new head unit, a phone update is applied, or the phone is un-paired and re-paired.
Toyota Safety Re2018-03-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements.
T-SB-0187-12_Rev2018-03-12. Service bulletin. TIRES. TSB: REVISION NOTICE February 12, 2018 Rev2: ? Applicability has been updated to include 2015 ? 2018 model year vehicles. January 23, 2014 Rev1: ? Applicability has been updated to include 2013 ? 2014 model year vehicles. Any previous printed versions of this bulletin should be discarded. Toyota vehicles are equipped with either conventional or run-flat tires. Sometimes punctures may occur as a result of contact with road debris or other hazards. If a puncture occurs, it may be possible to repair the tire and return it to service. With a conventional tire it is not possible to drive for an extended amount of time with the tire at low pressures as damage to the tire may occur. With run-flat tires, due to reinforced sidewalls, it is possible to drive for up to 100 miles at speeds less than 55 mph with little or no damage to the tire. The U.S. Tire Manufacturers Association (UTSMA) provides guidelines and recommendations for tire repair and replacement. It also provides information related to: ? Basic tire information ? Tire maintenance and safety ? Driver education, tire safety curriculum.
T-SB-0009-182018-03-12. Service bulletin. EQUIPMENT; SEATS. TSB: The purpose of this Service Bulletin is to elevate awareness and provide best practices for leather and synthetic leather care in Toyota vehicles. As an additional resource, if the vehicle is equipped with factory leather seats, the vehicle Owner?s Manual will highlight the importance of proper maintenance and provide guidance for care.
T-SB-0235-17_Rev2018-03-12. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM. TSB: REVISION NOTICE February 16, 2018 Rev2: ? Applicability has been updated to include 2018 model year Mirai and Camry HV vehicles. ? The Introduction and Initialization/Update Procedure sections have been updated. ? Instructions for adding a Safety Connect static cling to applicable vehicles have been added. July 20, 2017 Rev1: ? Applicability has been updated to exclude 2018 model year Avalon vehicles. ? The Initialization/Update Procedure section has been updated. Any previous printed versions of this bulletin should be discarded. An initialization procedure is required to activate the Entune? App Suite Connect for Entune? 3.0 Audio, Entune? 3.0 Audio Plus, and Entune? 3.0 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. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Following the initialization procedure, individual Entune? apps may periodically update through an over-the-air update system. Updates are optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the procedure in this bulletin to perform the initialization and app updates. Additionally, a Safety Connect static cling is available to increase customer awareness. This bulletin also includes the vehicle identification process for Safety Connect-equipped vehicles and the static cling installation procedure.
T-SB-0015-182018-03-12. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. TSB: Some 2018 model year Camry, Camry HV, and Sienna vehicles may exhibit Bluetooth® connectivity conditions with the multimedia system. This Service Bulletin is a diagnostic supplement to help determine the cause of the Bluetooth® connectivity conditions.
T-TT-0420-16_Rev2018-03-12. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Techstream cannot perform a DCM (Telematics ECU) Activation following a DCM replacement. Techstream may exhibit an ?ATX web service unavailable? error or similar message when attempting a DCM activation. This is a known condition and will be remedied in the near future.
T-SB-0001-18_Rev2018-03-12. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TSB: REVISION NOTICE February 02, 2018 Rev1: ? Applicability has been updated to include 2018 model year Sienna vehicles. ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. When completing a transaxle assembly replacement, Engine Control Module (ECM) (SAE term: Powertrain Control Module [PCM]) replacement, or ECM (PCM) reprogram, ensure the correct ECM (PCM) software is matched with the transaxle assembly hardware. Some 2017 ? 2018 model year Highlander and Sienna vehicles require different ECM (PCM) software based on the transaxle assembly hardware installed in the vehicle. NOTICE Mismatched transaxle assembly hardware and ECM (PCM) software combinations may result in a harsh shift or shift flare. If this occurs after the original repair, additional ECM (PCM) replacement and reprogramming will be required. This additional ECM (PCM) replacement and/or reprogramming is NOT covered under warranty. Use the information in this Service Bulletin to confirm that the correct ECM (PCM) hardware and software are used based on the transaxle assembly part number and serial number.
Toyota Safety Re2018-02-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2018-02-21. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements
T-SB-0337-172018-01-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TSB: Some customers may complain of the inability to use certain functions of the navigation/infotainment system while the vehicle is in motion. The following software update modifies the system functionality while the vehicle is in motion, improving customer experience. New software is available to address the following: ? Phone keypad unlocked while vehicle is in motion ? Contact list unlocked while vehicle is in motion ? Bluetooth connected phone switching while vehicle is in motion ? Navigation transition improvements (if equipped) ? Revised BT-Audio help pop-up ? Call history list call function improvements ? Reboot after coming out of Reverse ? Errors during phonebook transfer ? Sound settings reset after ignition key cycle ? Surround turns back on after key cycle ?Abnormal operation when listening to FM HD Radio
T-SB-0134-16_Rev2017-11-14. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. TSB: REVISION NOTICE October 30, 2017 Rev1: * Applicability has been updated to include 2018 model year vehicles. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU's information.
T-SB-0304-172017-11-14. Service bulletin. STRUCTURE:BODY:DOOR. TSB: Vehicle replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) may be available from Toyota, provided the request meets one of the criteria listed in this Service Bulletin.
T-SB-0235-172017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL. TSB: An initialization procedure is required to activate the Entune App Suite Connect for Entune 3.0 Audio, Entune 3.0 Audio Plus and Entune 3.0 Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also need to be performed under other circumstances, such as following a head unit replacement or after the customer's personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed and other factors.
T-SB-0233-172017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL. TSB: When a maintenance alert occurs, a message displays on the head unit with the "Call Dealer" button. It is important to program the dealer contact information into the head unit to ensure that the customer can schedule service.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.