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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-TT-0580-192019-12-16. Service bulletin. POWER TRAIN. TT: Some 2018-2020 model year UA80/UB80 transmission equipped models may experience a leak from the Transmission Side Cover. This issue is currently under investigation. Vehicles are being sought regardless of months in service or mileage. Only seeking vehicles with leaking transmissions with no other signs of damage to the side cover.
T-TT-0442-17_Rev2019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM (Telematics Transceiver) will be in an inactive state. In some instances, a DCM may need to be replaced even though the customer is not using the service. If registration of the replacement DCM part is attempted using the Techstream utility after the account has become inactive, the registration will fail, and messages such as ?ATX webserver is Down? or ?ATX error? will be displayed.
T-SB-0316-17_Rev2019-12-16. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. TSB: REVISION NOTICE November 14, 2019 Rev2: ? The Applicability has been updated to include 2019 model year Toyota vehicles. ? The Introduction and Repair Procedure sections have been updated. August 15, 2018 Rev1: ? The Applicability has been updated to include 2018 model year Highlander, Sienna, and Tacoma vehicles. ? The Introduction and Warranty Information sections have been updated. Any previous printed versions of this bulletin should be discarded. Some 2018 ? 2019 model year 2GR-FKS-equipped Camry, 2017 ? 2019 model year Highlander and Sienna, and 2016 ? 2019 model year Tacoma vehicles may exhibit a knocking noise from the vacuum pump with the engine idling. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0578-192019-12-02. Service bulletin. STEERING. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
T-TT-0573-192019-10-15. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may experience a call failure when attempting to call a conference call number that has been saved in their phonebook (ex: ?8005550122,,,1.,2;;;2#?). This issue is caused by changes to the Bluetooth in the iOS 13 update and may be resolved in a future iOS update.
T-TT-0566-192019-09-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TT: Some vehicles may display an error message that displays "New software is not compatible with the system. Contact your dealer." after the Display Control Unit (DCU) or navigation Multimedia Extension Unit (MEU) is replaced if the Phase 3 (CarPlay) retrofit is not applied prior to replacement. Panasonic exchange MEU and DCU parts are now being shipped with Phase 3 software installed.
ZH5_Dealer Lette2019-09-16. Service bulletin. STRUCTURE:BODY:DOOR. Dealer Package: Toyota has received a number of reports regarding the power sliding door rear lock assemblies on certain 2011 ? 2018 model year Sienna vehicles. In these reports, corrosion on the position sensor of the left and/or right power sliding door rear lock assembly caused that door to exhibit one or more of the abnormal operations described below: ?During power mode closing operation, as the power sliding door reaches the nearly closed position, the door reverses and moves toward the open position. ?During power mode closing operation, the power sliding door cannot completely close and latch. ?The power mode closing operation of the power sliding door is inoperative. Although the power sliding door rear lock assemblies are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is now extending the warranty coverage for repairs relating to corrosion on the position sensor of the left and/or right power sliding door rear lock assembly that causes that door to exhibit one or more of the abnormal operations described above. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
T-SB-0055-19_Rev2019-09-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL. TSB: REVISION NOTICE August 09, 2019 Rev2: ? Step 25 of the Software Update Procedure section has been updated with a Note. May 28, 2019 Rev1: ? The Introduction and Software Update Procedure sections have been updated and the Software Download and Extraction Procedure has been added. Any previous printed versions of this bulletin should be discarded. The procedure in this Service Bulletin is a full reformat of the multimedia system. Failure to follow the procedure exactly as written may cause damage to the head unit. This reformatting changes the system from a Phase 2 to a Phase 3 system, which includes Apple CarPlay® and Amazon Alexa?. The reformat requires all linked files and folders extracted from the zip file to be placed onto the root directory of the USB flash drive, otherwise damage to the head unit will occur. NOTE Performing this update may change certain head unit operation conditions. For a full list of changes, see System Limitations and FAQ.
ZKI_Dealer Packa2019-09-16. Service bulletin. STRUCTURE:BODY:DOOR. Dealer Package: This Customer Confidence Program is a component of a class action settlement that includes 3 elements of coverage, including prospective coverage for repairs to certain sliding door parts but only those repairs that relate to internal functional concerns of those parts on certain 2011 - 2018 model year Sienna vehicles.
T-TT-0553-192019-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TT: The new DCA-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter (GFCI) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ? Circuit demand is too high for GFCI rating ? Worn out GFCI internal contacts ? Improper installation or wiring of GFCI breaker
ZJC-Toyota POL192019-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN. Customer Support Program Bulletin: Toyota has received reports indicating potential symptoms, such as a whine noise from the transmission while driving, harsh shifting, reduced power, and master warning light/check engine light illumination, in the subject vehicles that are equipped with a model UA80 transmission. There is a possibility that a washer tab, designed to prevent the loosening of a nut inside the affected transmissions, was not sufficiently bent during assembly. This could lead to the nut loosening and, over time, lead to the symptoms described above.
T-SB-0080-192019-09-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:APPLIANCE:AIR CONDITIONER. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0033-14. ? Applicability has been updated to include 2019 model year Toyota vehicles. Service Bulletin No. T-SB-0033-14 is obsolete and any printed versions should be discarded. Some 2006 ? 2019 model year Toyota vehicles in particular geographic areas may exhibit a condition where the HVAC evaporator drain hose has become obstructed with an insect nest. An insect repellent drain hose tip (ARINIX® Tip) is available to help minimize future occurrences of this environmental condition. For some models, a new drain hose is required to properly fit the ARINIX® Tip. Follow the procedures in this bulletin for proper handling and installation of this optional service part. NOTE The ARINIX® Tip is NOT registered or labeled for sale or use outside the United States or Puerto Rico.
T-SB-0076-192019-09-03. Service bulletin. EQUIPMENT; WHEELS. TSB: Some 2009 ? 2019 model year Toyota vehicles with super chrome wheel finishes may become discolored and/or damaged when aftermarket cleaners, polishes, or brake dust removal products are used on wheels with super chrome finishes. Wheel cleaners and polish that contain acidic substances may damage the clear coat of the wheel, resulting in the undercoating (black) to become visible.
T-SB-0134-16-Rev2019-09-03. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; ENGINE. TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. 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. NOTE ECU is a Toyota term used to describe integrated computerized devices responsible for managing the operation of a system or subsystem. For the purposes of this bulletin, the term ?ECU? is used as a generic label for the following SAE J1930 standard references: ? Powertrain Control Module (PCM) ? Engine Control Module (ECM) ? Transmission Control Module (TCM) ? Any other Toyota specific control unit
T-TT-0551-192019-07-15. Service bulletin. EQUIPMENT. TT: Some customers may experience an Entune? update pop-up message after every key cycle.
ZH5_Toyota POL172019-07-15. Service bulletin. LATCHES/LOCKS/LINKAGES; STRUCTURE; STRUCTURE:BODY:DOOR. Customer Support Program: Toyota has received a number of reports regarding the power sliding door rear lock assemblies on certain 2011?2018 model year Sienna vehicles. In these reports, corrosion on the position sensor of the left and/or right power sliding door rear lock assembly caused that door to exhibit one or more of the abnormal operations described below: ? During power mode closing operation, as the power sliding door reaches the nearly closed position, the door reverses and moves toward the open position. ? During power mode closing operation, the power sliding door cannot completely close and latch. ? The power mode closing operation of the power sliding door is inoperative.
ZKF_Toyota POL192019-07-15. Service bulletin. STRUCTURE:BODY:DOOR; STRUCTURE; EQUIPMENT. Customer Support Program: In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a proposed class action settlement, Toyota is announcing a Customer Support Program to provide coverage for the sliding door center hinge assembly. Although the sliding door center hinge assembly is covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever occurs first), we at Toyota care about each customer?s ownership experience. Toyota is providing additional coverage for repairs related to sliding door center hinge assembly. Only those repairs that are related to internal functional concerns of the sliding door center hinge assembly that impede the closing and/or opening operations of the sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKF_Toyota POL192019-07-15. Service bulletin. STRUCTURE; STRUCTURE:BODY:DOOR; EQUIPMENT. Customer Support Program: In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a proposed class action settlement, Toyota is announcing a Customer Support Program to provide coverage for the sliding door center hinge assembly. Although the sliding door center hinge assembly is covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever occurs first), we at Toyota care about each customer?s ownership experience. Toyota is providing additional coverage for repairs related to sliding door center hinge assembly. Only those repairs that are related to internal functional concerns of the sliding door center hinge assembly that impede the closing and/or opening operations of the sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKD_Toyota POL192019-07-15. Service bulletin. STRUCTURE:BODY:DOOR; EQUIPMENT; STRUCTURE. Customer Program Support: In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a proposed class action settlement, Toyota is announcing a Customer Support Program to provide coverage for the power sliding door cable sub-assembly. Although the power sliding door cable sub-assemblies are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever occurs first), we at Toyota care about each customer?s ownership experience. Toyota is providing additional coverage for repairs related to the power sliding door cable sub-assembly. Only those repairs that are related to internal functional concerns of the power sliding door cable sub-assembly that impede the closing and/or opening operations of the power sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKD_Dealer Packa2019-07-15. Service bulletin. STRUCTURE:BODY:DOOR; EQUIPMENT; STRUCTURE. Dealer Package: Certain 2011 ? 2018 Model Year Sienna Vehicles Coverage for the Power Sliding Door Cable Sub-Assembly (Vehicles equipped with power sliding doors ONLY). In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a class action settlement, Toyota is announcing a Customer Support Program to provide coverage for repairs to the power sliding door cable sub-assembly. Although the power sliding door cable sub-assemblies are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs to the power sliding door cable sub-assembly. Only those repairs that are related to internal functional concerns of the power sliding door cable sub-assembly that impede the closing and/or opening operations of the power sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKE_Toyota POL192019-07-15. Service bulletin. EQUIPMENT; FUEL/PROPULSION SYSTEM. Customer Support Program: In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a proposed class action settlement, Toyota is announcing a Customer Support Program to provide coverage for the fuel filler door hinge and pin. Although the fuel filler door hinge and pin are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever occurs first), we at Toyota care about each customer?s ownership experience. Toyota is providing additional coverage for repairs related to the fuel filler door hinge and pin. Only those repairs that are related to internal functional concerns of the fuel filler door hinge and pin that impede the closing and/or opening operations of the power sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKE_Dealer Packa2019-07-15. Service bulletin. EQUIPMENT; STRUCTURE. Dealer Package: Certain 2011 ? 2018 Model Year Sienna Vehicles Coverage for the Fuel Filler Door Hinge and Pin. In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a class action settlement, Toyota is announcing a Customer Support Program to provide coverage for repairs to the fuel filler door hinge and pin. Although the fuel filler door hinge and pin are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs to the fuel filler door hinge and pin. Only those repairs that are related to internal functional concerns of the fuel filler door hinge and pin that impede the closing and/or opening operations of the sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKF_Dealer Packa2019-07-15. Service bulletin. STRUCTURE; STRUCTURE:BODY:DOOR. Dealer Package: Certain 2011 ? 2018 Model Year Sienna Vehicles Coverage for the Sliding Door Center Hinge Assembly. In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a class action settlement, Toyota is announcing a Customer Support Program to provide coverage for repairs to the sliding door center hinge assembly. Although the sliding door center hinge assembly is covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs to the sliding door center hinge assembly. Only those repairs that are related to internal functional concerns of the sliding door center hinge assembly that impede the closing and/or opening operations of the sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKF_Dealer Packa2019-07-15. Service bulletin. STRUCTURE:BODY; STRUCTURE. Dealer Package: Certain 2011 ? 2018 Model Year Sienna Vehicles Coverage for the Sliding Door Center Hinge Assembly. In our continuing efforts to ensure the best in customer satisfaction, and pursuant to a class action settlement, Toyota is announcing a Customer Support Program to provide coverage for repairs to the sliding door center hinge assembly. Although the sliding door center hinge assembly is covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs to the sliding door center hinge assembly. Only those repairs that are related to internal functional concerns of the sliding door center hinge assembly that impede the closing and/or opening operations of the sliding door in manual and/or power modes are covered. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZKJ_Dealer Packa2019-07-15. Service bulletin. STRUCTURE; STRUCTURE:BODY:DOOR. Dealer Package: Certain 2011 - 2018 Model Year Sienna Vehicles Sienna Sliding Door Functional Inspection. This Sienna Sliding Door Functional Inspection is one of multiple elements involved in a class action settlement. Refer to Customer Confidence Program ZKI for comprehensive information on the class action settlement and its other elements.

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