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Service bulletins for the 2012 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.

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

By type

By component

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Bulletins, newest first
T-TT-0234-132018-04-02. Service bulletin. EQUIPMENT. 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-PG006-00 Obsol2018-04-02. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin is now obsolete. Please see T-SB-0054-13.
T-SB-0054-132018-04-02. Service bulletin. EQUIPMENT. California (CA), Federal (FED), and 50 State Certified emission control underhood labels (emission labels) may be obtained through your dealership?s Parts Department utilizing standard replacement parts ordering procedures. Follow the guidelines outlined in this bulletin to ensure proper label application.
T-SB-0053-132018-04-02. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. After initial start-up in cold weather conditions, the front windshield defroster pattern may not meet customer expectations. An updated A/C amplifier is available that improves the front windshield defroster pattern.
T-SB-0035-13 Rev2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; AIR BAGS. Some 2012 model year Corolla, Prius, Prius V, Sienna, and Venza vehicles may set SRS Diagnostic Trouble Codes (DTCs) that are not listed in the Repair Manual. Refer to the chart in this bulletin to diagnose these DTCs.
T-SB-0141-10 Rev2018-04-02. Service bulletin. STRUCTURE:EMERGENCY:ESCAPE/EGRESS/EXIT; BACK OVER PREVENTION. If a creak, tick, or rattle noise is heard at the top or bottom of the windshield, or at the top of the rear glass, the source of the noise may be the two stoppers bonded to the top of the windshield/rear glass, or the windshield retainers bonded to the lower edge of the windshield. This bulletin provides the recommended repair procedure to eliminate these types of noises from the windshield/rear glass area.
T-SB-0052-132018-04-02. Service bulletin. STRUCTURE; STRUCTURE:EMERGENCY:ESCAPE/EGRESS/EXIT. Some 2011 ? 2012 model year Sienna vehicles may exhibit a condition where the front door glass run on either the RH or LH side becomes loose or does not stay in place. Vehicles may also exhibit a condition where the front door glass run is pulled off the track and may come down while the window is operated. Use the following repair procedure to address this condition.
T-TT-0246-132018-04-02. Service bulletin. VISIBILITY. Tips for writing a DPR (Dealer Product Report) on manufacturing issues for windows and windshields.
T-SB-0083-132018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:APPLIANCE:AIR CONDITIONER. The procedure in this bulletin is a general guideline on how to properly diagnose the air conditioning system after a component failure. Refer to the applicable Repair Manual for vehicle specific repair procedures and parts.
T-SB-0060-12 Rev2018-04-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. An Initialization Process is required to activate the Entune? suite of Apps & Data Services on Premium HDD Navigation with Entune? and Display Navigation with Entune? head units before they are used for the first time on new vehicles. The Initialization Process 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 process requires between 3 and 15 minutes to complete, depending on the type of head unit, file size, cellular connection speed, and other factors.
T-TT-0257-132018-04-02. Service bulletin. EQUIPMENT. iTunes Radio is a new feature for iPhone 4, 4S, 5, 5S, and 5C running iOS 7 or later. This feature does work with the in-vehicle audio system either via Bluetooth or by USB cable. Details on how to access this feature are described below.
T-TT-0256-132018-04-02. Service bulletin. EQUIPMENT. Customers using iPhone 4, 4S, 5, 5S, or 5C running iOS 7.0 or later now have the ability to make Facetime Audio calls (no video). When a customer is paired by Bluetooth Hands Free and they make a Facetime Audio call the vehicle radio will treat it as a typical Bluetooth phone call. Because Facetime works differently than a typical phone call, the in-vehicle experience may not meet the customer?s expectations.
T-TT-0199-12 Rev2018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Some users may experience no sound from the Pandora or iHeartRadio Entune Applications after attaching the iPhone USB cable to the multimedia system. This can also occur if the user chooses the iPod selection on the multimedia system and then attempts to return to Pandora or iHeartRadio Entune Applications. This condition occurs with iPhones running iOS 6.0 and later.
T-TT-0250-13 Rev2018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. To receive satellite radio functions after the initial trial period has expired, the customer must enter into a contract with XM Satellite Radio Inc. After entering into a contract, registration of an 8-digit XM Radio ID is required. This 8-digit XM Radio ID is found by turning to channel ?0? of the satellite radio.
T-TT-0051-10 Rev2018-04-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. If a customer states there is an unpleasant odor in the vehicle from the HVAC system, there are various factors that may be involved.
T-TT-0251-132018-04-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Some customers may experience A/C is inoperative with the DTC B1479 present. This can be caused by debris stuck in the flow control valve.
T-TT-0051-102018-04-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER. If a customer states there is an unpleasant odor in the vehicle from the HVAC system, there are various factors that may be involved.
T-TT-0269-132018-04-02. Service bulletin. VISIBILITY:GLASS, SIDE/REAR. The appearance of spots in tempered glass (when viewed at certain angles) is the result of the heat treating and quick quenching process during manufacturing.
T-TT-0268-132018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. 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 they have restored their phone data/settings recently.
T-TT-0262-132018-04-02. Service bulletin. ENGINE. Due to the improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicles that require this oil. With this change, the following should be noted
T-TT-0260-132018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL. Customer?s experiencing this condition can use a 3rd party podcast application on their iPhone (such as Pocket Casts or Instances) instead of the native Apple Podcast application.
T-SB-0041-13 Rev2018-04-02. Service bulletin. ENGINE. Immediately following a cold soak startup, some 2009 ? 2013 model year vehicles equipped with 1AR-FE or 2AR-FE engines may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. Follow the repair procedure below to address this condition.
T-SB-0152-132018-04-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Some vehicles may exhibit a condition where there is a lack of cooling from the A/C system. An A/C Line Retainer (Piping Clamp) may have become unlatched and caused a refrigerant leak. Follow the procedure in this bulletin to address this condition.
T-SB-0071-11 Rev2018-04-02. Service bulletin. POWER TRAIN. The purpose of this service bulletin is to provide precautions to follow when installing an automatic transmission/transaxle assembly to avoid MIL ?ON,? shifting issues, and/or transmission damage. Use the information in this bulletin when installing an automatic transmission/transaxle assembly
T-SB-0122-11 Rev2018-04-02. Service bulletin. AIR BAGS; SEATS; EQUIPMENT. Beginning in 1998, Toyota introduced side airbags as optional equipment. Toyota does NOT recommend replacement of original seat covers with non-Toyota leather or other seat cover materials on vehicles due to the following: Seat covers NOT recommended by Toyota may affect side airbag performance, in general or in part, during an accident. Modifications that negatively affect side airbag performance can result in severe occupant injuries. Seat covers are an integral part of this safety system. Replacing fabric seat covers with non-Toyota leather or other seat cover materials may compromise the effectiveness of this safety system. The design of the seat is complex, integrating safety and strength with comfort and luxury. Toyota strongly discourages modifying original equipment seats that have optional side airbags. Additionally, Toyota strongly advises against the installation or use of aftermarket seat covers, which could impair the performance of the side airbags in the event of an accident.

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