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.
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Only bulletins with component: Engine are shown. Show all
| T-TT-0262-13 Rev | 2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING. TT: Starting with 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil. Due to the them 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. |
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| T-TT-0362-15 | 2017-03-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED. |
| T-SB-0012-13 REV | 2017-03-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "TSB: FLASH REPROGRAMMING ALLOWS THE 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-0041-13 | 2016-04-12. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE. |
| TSB-0041-13 | 2014-03-05. Service bulletin. ENGINE. TOYOTA: ON CERTAIN VEHICLES, A KNOCK OR RATTLE NOISE, COMING FROM ENGINE COMPARTMENT, IS HEARD DURING A COLD SOAK STARTUP, AND THE CONDITION LASTS APPROXIMATELY ONE SECOND. MODEL YEARS 2009-2012 CAMRY, HIGHLANDER, SIENNA, VENZA, RAV4. *PE |
| TSB-004-13-A | 2013-12-07. Service bulletin. ENGINE. TOYOTA: THERE IS A KNOCKING OR RATTLING NOISE COMING FROM ENGINE COMPARTMENT, FOR A SHORT PERIOD OF TIME, AFTER A COLD SOAK STARTUP. MODEL 2010-2012 CAMRY, 2009-2013 HIGHLANDER, VENZA, 2009-2012 RAV4, 2011-2013 SIENNA. *PE |
| T-SB-0055-12 | 2012-05-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. TOYOTA: CHARGING SYSTEM INOPERATIVE. SOME ENGINES MAY EXHIBIT INSUFFICIENT CHARGING PERFORMANCE FROM THE ALTERNATOR. AN UPDATED PULLEY ASSEMBLY IS AVAILABLE TO ADDRESS THIS CONDITION. *JS |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.