Service bulletins for the 2015 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.
347 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| T-TT-0442-17_Rev | 2018-06-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active. The trail period of service is provided upon the vehicle purchase. 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. |
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| T-SB-0033-18 | 2018-06-18. Service bulletin. SERVICE BRAKES. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0045-14. * Applicability has been updated to include 2018 model year Sienna vehicles. * The entire bulletin has been updated. Service Bulletin No. T-SB-0045-14 is obsolete and any printed versions should be discarded. Some 2011 - 2018 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-SB-0049-16 | 2018-06-11. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; LANE DEPARTURE: BLIND SPOT DETECTION. TSB: Some 2015 ? 2016 model year Avalon, Camry, Sienna, and Tundra vehicles equipped with Blind Spot Monitor may exhibit a Blind Spot Monitor Warning message with Diagnostic Trouble Code (DTC) C1AB2 Short to Ground in Outer Mirror Indicator (Master) or C1AB3 Short to Ground in Outer Mirror Indicator (Slave) stored. Follow the Repair Procedure in this bulletin to address this condition. |
| T-SB-0044-16 | 2018-06-11. Service bulletin. STRUCTURE:BODY. TSB: On some vehicles, when Rapgard? is removed, the paint may have a stained appearance. These stains appear to be under the clear coat (repainting this area is not necessary). The stain patterns are usually under wrinkles in the Rapgard?. These wrinkles sometimes trap water and cause the paint to stain from the trapped moisture, especially on horizontal surfaces, such as the hood, roof, and trunk. Stains can be removed by heating the stained surface to remove the trapped moisture. |
| T-SB-0035-16 | 2018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TSB: Some 2014 model year applicable vehicles equipped with Entune? Audio (version 010169) / Entune? Audio Plus (version 010171) / Entune? Premium Audio (version 010185) may exhibit one or more of the following conditions. |
| T-TT-0392-16 Rev | 2018-06-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TT: Some customers may experience Bluetooth connection issues after updating the Android Operating System to 5.x.x (Lollipop) or later. |
| T-SB-0026-16 | 2018-06-11. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM. TSB: Some 2014 - 2016 Sienna vehicles may exhibit an intermittent cruise control stalk illumination flicker condition. Please follow the Repair Procedure in this bulletin to address this condition. |
| T-TT-0339-15 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM. TT: Some vehicles may exhibit an error message when trying to perform a radio software update: ?Unable to update the software. Please try again later.? If the following screen is seen; follow the directions below. |
| T-TT-0234-13 Rev | 2018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems. Refer to the chart below for a comprehensive list of all current and previously issued USB SSTs and their applicability. |
| T-TT-0234-13 Rev | 2018-04-23. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TT: Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems. Refer to the chart below for a comprehensive list of all current and previously issued USB SSTs and their applicability. |
| T-TT-0293-14 Rev | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM. TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active. The first year of service is provided in the vehicle purchase price. Once the subscription has lapsed the DCM 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. |
| T-TT-0355-15 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TechTip: Condition: Customers may experience connectivity issues when the following conditions are met: The customer?s iPhone is operating on iOS9 firmware The customer?s iPhone is connected to the vehicle via Bluetooth. If the vehicle is equipped with a Fujitsu-Ten brand head unit, the customer may complain of one or more of the following: When playing media via Bluetooth audio and pressing the ?Pause? button on the phone, media playback pauses for one second before resuming playback. Yelp searches return an error when search criteria includes a special character, e.g. !,$,#. If the vehicle is equipped with a Pioneer brand head unit, the customer may complain of one or more of the following: The customer?s iPhone does not support the album image feature. When playing media via Bluetooth audio, one or more of a number of play/pause issues occur. |
| T-SB-0029-14 Rev | 2018-04-23. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. TSB: 2015 ? 2016 model year vehicles are equipped with driver?s side floor mat retaining clips to secure the floor mat in the correct position. In addition, some models may utilize retaining clips for passenger side and rear seat floor mats as well. Follow the appropriate installation procedure to attach the driver?s side, and if applicable, the passenger?s side and rear seat floor mats to the vehicle carpet using the floor mat retaining clips during Pre-Delivery Service (PDS). |
| T-SB-0024-14 Rev | 2018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. TSB: Some 2015 - 2016 model year vehicles are equipped with a Smart Key system, which allows the customer to enter and start the vehicle without using a mechanical key. To ensure the system is operating properly, the Smart Key functions (Smart Entry and Smart Start) should be inspected during Pre-Delivery Service (PDS). The following inspection procedure has been developed to confirm the proper operation of the Smart Key system prior to vehicle delivery. |
| T-SB-0160-14 Rev | 2018-04-23. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TSB: Some 2014 model year applicable vehicles equipped with Entune? Audio (version 010169) / Entune? Audio Plus (version 010171) Entune? Premium Audio (version 01085) may exhibit one or more of the following conditions: Bluetooth® sometimes disconnects with Android? phones Bluetooth® disconnects with iPhone® 4 when connected to USB Radio reboots with heavy radio load condition (e.g., dual map and POIs ON and Entune? Audio music ON and multiple destinations set) (Entune? Premium Audio only) Radio reboots after completing a navigation route by voice command system and pressing Talk Switch (Entune? Premium Audio only) |
| T-TT-0392-16 | 2018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some customers may experience Bluetooth connection issues after updating the Android Operating System to 5.x.x (Lollipop) or later. |
| T-SB-0036-13 Rev | 2018-04-23. Service bulletin. POWER TRAIN. TSB: This bulletin includes basic procedures for inspecting and adjusting World Standard (WS) Automatic Transmission Fluid (ATF) level at normal vehicle operating temperature. Note: The following adjustment procedures are for U660E/F and U760E/F transmissions. |
| T-SB-0049-16 Rev | 2018-04-23. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR. TSB: Some 2015 ? 2016 model year Avalon, Camry, Sienna, and Tundra vehicles equipped with Blind Spot Monitor may exhibit a Blind Spot Monitor Warning message with Diagnostic Trouble Code (DTC) C1AB2 Short to Ground in Outer Mirror Indicator (Master) or C1AB3 Short to Ground in Outer Mirror Indicator (Slave) stored. Follow the Repair Procedure in this bulletin to address this condition. |
| T-TT-0339-15 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: Some vehicles may exhibit an error message when trying to perform a radio software update: "Unable to update the software. Please try again later." If the following screen is seen, follow the directions below. |
| T-TT-0374-15 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TT: Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems. Refer to the chart below for a comprehensive list of all current and previously issued USB SSTs and their applicability. |
| TTT-0268-13 Rev3 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may encounter Bluetooth connectivity concerns such as: ? Difficulty pairing the phone. ? Intermittent Bluetooth failure to connect when first turning on the vehicle. ? Various Bluetooth Audio functions are no longer functioning with the customer?s phone, such as the 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-SB-0026-16 | 2018-04-23. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL. TSB: Some 2014 ? 2016 model year Sienna vehicles may exhibit an intermittent cruise control stalk illumination flicker condition. Please follow the Repair Procedure in this bulletin to address the condition. |
| T-SB-0024-16 | 2018-04-23. Service bulletin. POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT. TSB: Some 2015 ? 2016 model year Sienna vehicles may exhibit a grease leak where grease is coming through the boot clamp area on the big end of the outboard front axle shaft joint. Follow the Repair Procedure in this bulletin to address the condition. |
| T-TT-0385-16 | 2018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Tech Tip: This Tech Tip is being provided to bring attention to the new location of the Entune/NAV/Map Update and Upgrade USB Directory. Click on the TIS tab, Diagnostics tab, Telematics tab, and the document is now located under the reference documents sections. This change has occurred to help speed up the updating process of this document. |
| TTT-0337-15 Rev1 | 2018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: When updating either the navigation or radio firmware, verify the vehicle applicability BEFORE beginning the update. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.