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.
By type
By component
By trouble code
By topic
| T-SB-0122-20 | 2021-01-25. Service bulletin. ELECTRICAL SYSTEM. TSB: Some 2017 ? 2018 model year Highlander and Sienna, 2018 model year Camry, and 2019 model year Avalon vehicles with and without the stop and start feature may exhibit a flex lock-up concern and MIL ON with Diagnostic Trouble Codes (DTCs) P07407E and/or P27567F. Vehicles that have experienced a delay in engagement from R to D will experience flex lock-up concerns from loss of solenoid pressure. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. |
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| T-SB-0047-19 Obs | 2021-01-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. OBSOLETE NOTICE December 11, 2020: This bulletin is now obsolete. Please see T-SB-0119-20. |
| T-SB-0047-20 Rev | 2021-01-25. Service bulletin. EQUIPMENT:ELECTRICAL:AUX AUDIO JACK/PLUG. TSB: Some 2019 model year RAV4 and RAV4 Hybrid and 2018 ? 2020 model year Sienna vehicles equipped with Audio Plus (version 1010) or Premium Audio (version 1010) or earlier may exhibit one or more of the following conditions: ?Toyota apps fail to download. ?Bluetooth® is unable to automatically connect after key cycle. ?Abnormal microphone operation. ?Sirius XM® antenna disconnection history Diagnostic Trouble Code (DTC) B15FE. ?No outgoing voice during phone calls when using Apple CarPlay®. ?Incoming calls incorrectly show on the multi-information display (MID) when using Apple CarPlay®. ?CAN networking DTC B1321. ?Volume inoperative after using Siri®. ?Unable to adjust the treble audio setting. ?Song information flickering. ?Unable to select Sirius XM® music genre by voice recognition. ?Noise when hanging up call on handset. ?Transferred contacts do not match the number of handset contacts. ?Sirius XM® sound slow to start. ?Abnormal Toyota apps and Scout Operation. |
| T-SB-0013-19 Rev | 2021-01-25. Service bulletin. ELECTRICAL SYSTEM. TSB: Some 2016 ? 2018 model year Prius and Tacoma, 2017 ? 2018 model year Prius Prime and Sienna, and 2018 model year Camry and Camry Hybrid vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P261093 (ECM/PCM Engine Off Timer Performance No Operation) present. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition. |
| T-SB-0001-18 Rev | 2021-01-25. Service bulletin. ELECTRICAL SYSTEM. TSB: 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. |
| T-SB-0033-18 Rev | 2020-12-21. Service bulletin. SERVICE BRAKES. TSB: Some 2011 ? 2020 model year Sienna vehicles may exhibit a vibration/pulsation from the front brakes that can be felt in the brake pedal while lightly applying the brake pedal. Follow the Repair Procedure in this bulletin to address this condition. |
| T-TT-0600-20 Rev | 2020-12-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. 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. |
| T-SB-0112-20 | 2020-12-21. Service bulletin. EQUIPMENT:ELECTRICAL. TSB: Some 2018 ? 2020 model year Sienna (XLE, Limited); 2019 model year Avalon, Avalon Hybrid, Corolla Hatchback, Highlander (Platinum only), Highlander Hybrid (Platinum only), RAV4, and RAV4 Hybrid; and 2020 model year Corolla, Corolla Hybrid, Prius (excluding Limited), and Prius Prime (excluding XLE, LTD) vehicles equipped with Safety Connect may exhibit one or more of the following conditions: ?SOS button lights are inoperative ?Bluetooth® microphone and voice command are inoperative ?Right front audio speakers are inoperative ?Connected services are inoperative ?Remote start is inoperative A replacement telematics transceiver assembly is now available to address these conditions. Follow the Repair Procedure in this bulletin to address these conditions. |
| T-TT-0631-20 | 2020-11-30. Service bulletin. EQUIPMENT. TT: NOTE: This document only applies to certain audio packages for the following vehicles. 2019 C-HR (Audio Plus & Premium Only) 2020 Prius (Audio Only) 2020 Prius Prime (Audio Plus Only) Head unit telematics services become inoperative after DCM replacement and activation if the guest has an ACTIVE Verizon Wi-Fi Pre-Paid subscription. Head unit services include Wi-Fi, Destination Assist, Dynamic Navigation, and Dynamic Voice Recognition. Verizon is not able to transfer the Pre-Paid subscription to the new DCM automatically. As a result, the guest is unable to use their head unit telematics services. At this time if the DCM is replaced and activated before confirming the guests Wi-Fi subscription status, this may require Verizon?s IT to perform a manual fix on the customer?s account. |
| T-TT-0628-20 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. TT: HVAC drain tube is found to be blocked/clogged. |
| T-SB-0047-20 Rev | 2020-11-30. Service bulletin. BACK OVER PREVENTION. TSB: Some 2019 model year RAV4 and RAV4 Hybrid and 2018 ? 2020 model year Sienna vehicles equipped with Audio Plus (version 1010) or Premium Audio (version 1010) or earlier may exhibit one or more of the following conditions: ?Toyota apps fail to download. ?Bluetooth® is unable to automatically connect after key cycle. ?Abnormal microphone operation. ?Sirius XM® antenna disconnection history Diagnostic Trouble Code (DTC) B15FE. ?No outgoing voice during phone calls when using Apple CarPlay®. ?Incoming calls incorrectly show on the multi-information display (MID) when using Apple CarPlay®. ?CAN networking DTC B1321. ?Volume inoperative after using Siri®. ?Unable to adjust the treble audio setting. ?Song information flickering. ?Unable to select Sirius XM® music genre by voice recognition. ?Noise when hanging up call on handset. ?Transferred contacts do not match the number of handset contacts. ?Sirius XM® sound slow to start. ?Abnormal Toyota apps and Scout Operation. Some 2020 model year Prius and Prius Prime, 2019 model year RAV4 and RAV4 Hybrid, and 2018 ? 2020 model year Sienna vehicles equipped with Audio Plus (version 1195), Premium Audio (version 1195), or Navigation (version 1035) or earlier may exhibit one or more of the following conditions: ?Unable to play audio source after incoming call. ?Software enhancements. ?Intermittent rebooting. ?Unable to register Bluetooth® devices from Bluetooth® Audio Mode. ?Unable to pair Android? devices after Google? apps update. ?Unable to access camera diagnosis system. ?USB audio does not resume.?Intermittent Bluetooth® disconnection. ?Abnormal voice recognition operation. ?Phone call history does not update. ?Bluetooth® loses connection after USB connection is made. ?Navigation inoperative. ?Microphone disconnected pop-up message. ?Clock not displayed on the map screen. ?Intermittent phone ringing with no incoming phone call. |
| T-SB-0103-20 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP; EQUIPMENT. TSB: This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 ? 2021 model year Toyota vehicles. |
| T-TT-0578-19 Rev | 2020-11-23. Service bulletin. STEERING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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-0566-19 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL. 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. |
| T-SB-0047-19 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TSB: Some 2018 ? 2020 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update; however, the process for generating license keys differs from previous generations. Before attempting to perform a map update, the head unit?s expiration date must be checked. If the expiration date is still valid, a license key may be generated without the use of an activation card number. Updating the maps without the use of an activation card number is considered an Embedded Navigation Update (refer to pg. 10) and performing this process does not extend the duration of telematic map services. If the head unit?s expiration date is expired, or is expiring within the next 90 days, it should be recommended to the customer to purchase an activation number. Utilizing an activation number will initiate a Dynamic Navigation Update (refer to pg. 4). This Dynamic Navigation Update will perform the Embedded Navigation Update and provide telematic map services for a period of two years from the day that the Dynamic Navigation Update is performed. Activation card numbers are provided in an activation card number pamphlet available through the normal parts ordering system. |
| T-SB-0046-20 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TSB: Some 2018 ? 2019 model year Camry, Camry Hybrid, and Sienna vehicles equipped with Entune? 3.0 Audio Plus (version 1010) or Entune? 3.0 Premium Audio (version 1010) or earlier may exhibit one or more of the following conditions: ?Abnormal navigation operation. ?Screen freezing. ?Intermittent rebooting. ?Abnormal clock operation. ?Abnormal Apple CarPlay® operation. ?Echoing during Apple CarPlay® phone call. ?Abnormal Pandora® operation after answering WhatsApp phone call. ?Alexa® app inoperative when using iOS devices. |
| T-TT-0566-19 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. 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. |
| T-SB-0047-19 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TSB: Some 2018 ? 2020 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update; however, the process for generating license keys differs from previous generations. Before attempting to perform a map update, the head unit?s expiration date must be checked. If the expiration date is still valid, a license key may be generated without the use of an activation card number. Updating the maps without the use of an activation card number is considered an Embedded Navigation Update (refer to pg. 10) and performing this process does not extend the duration of telematic map services. If the head unit?s expiration date is expired, or is expiring within the next 90 days, it should be recommended to the customer to purchase an activation number. Utilizing an activation number will initiate a Dynamic Navigation Update (refer to pg. 4). This Dynamic Navigation Update will perform the Embedded Navigation Update and provide telematic map services for a period of two years from the day that the Dynamic Navigation Update is performed. Activation card numbers are provided in an activation card number pamphlet available through the normal parts ordering system. |
| T-SB-0046-20 Rev | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TSB: Some 2018 ? 2019 model year Camry, Camry Hybrid, and Sienna vehicles equipped with Entune? 3.0 Audio Plus (version 1010) or Entune? 3.0 Premium Audio (version 1010) or earlier may exhibit one or more of the following conditions: ?Abnormal navigation operation. ?Screen freezing. ?Intermittent rebooting. ?Abnormal clock operation. ?Abnormal Apple CarPlay® operation. ?Echoing during Apple CarPlay® phone call. ?Abnormal Pandora® operation after answering WhatsApp phone call. ?Alexa® app inoperative when using iOS devices. |
| T-TT-0615-20 Rev | 2020-09-14. Service bulletin. ENGINE. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data. |
| T-TT-0615-20 Rev | 2020-09-14. Service bulletin. EQUIPMENT; ENGINE. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data. |
| T-TT-0618-20 | 2020-08-24. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; ELECTRICAL SYSTEM. TT: During the Phase 3 update to add Apple CarPlay® to 2018 model year Camry, Camry HV, and Sienna vehicle head units, if the procedure in the TSBs aren?t followed exactly as written, damage to the head unit may occur. Please take extra precautions when performing these TSBs. |
| T-TT-0553-19 Rev | 2020-08-24. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 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 |
| T-TT-0468-17 Rev | 2020-08-17. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. TT: HVAC drain tube is found to be blocked/clogged. |
| T-TT-0615-20 Rev | 2020-07-27. Service bulletin. ENGINE. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.