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Service bulletins for the 2016 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.

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

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Bulletins, newest first
T-SB-0025-152017-08-14. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. TSB: While a vehicle is in inventory, the battery is subject to conditions that can reduce its performance and life. Batteries can become discharged due to an extended storage period, temperature, parasitic drain, or while demonstrating vehicle features and benefits in the sales process. Battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As described in this bulletin, operating the engine for 30 minutes after 60 days in storage and every 30 days thereafter will help to maintain battery State of Charge (SOC). This process supplements other movements of the vehicle as it is staged, and has specific restrictions on how maintenance is to be done. Also described in this bulletin are 2 other approved methods for maintaining battery State of Charge.
T-SB-0083-13 Rev2017-08-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TSB: 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-TT-0344-152017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. TT: iPhone text messages do not appear on multimedia display.
T-SB-0043-14 Rev2017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system. NOTE: There are new security provisions required to obtain a Reset Pass-Code. It is critical that the instructions for this new process are reviewed BEFORE attempting to get a Pass-Code in the new system.
G0G_TI_SIENNA OX2017-06-14. Service bulletin. ENGINE. TECHNICAL INSTRUCTIONS: THE SUBJECT VEHICLES ARE EQUIPPED WITH AN OXYGEN SENSOR WHICH COULD EXPERIENCE WIRE DEGRADATION INSIDE THE OXYGEN SENSOR WIRING HARNESS CAUSED BY VEHICLE VIBRATION DURING NORMAL OPERATION. IF THIS OCCURS, THE VEHICLE WILL ILLUMINATE THE CHECK ENGINE LIGHT.
G0G_DEALER LETTE2017-05-25. Service bulletin. ELECTRICAL SYSTEM. DEALER EMAIL: THE SUBJECT VEHICLES ARE EQUIPPED WITH AN OXYGEN SENSOR WHICH COULD EXPERIENCE WIRE DEGRADATION INSIDE THE OXYGEN SENSOR WIRING HARNESS CAUSED BY VEHICLE VIBRATION DURING NORMAL OPERATION. IF THIS OCCURS, THE VEHICLE WILL ILLUMINATE THE CHECK ENGINE LIGHT.
G0G_REGION LETTE2017-05-25. Service bulletin. ELECTRICAL SYSTEM. REGION LETTER: THE SUBJECT VEHICLES ARE EQUIPPED WITH AN OXYGEN SENSOR WHICH COULD EXPERIENCE WIRE DEGRADATION INSIDE THE OXYGEN SENSOR WIRING HARNESS CAUSED BY VEHICLE VIBRATION DURING NORMAL OPERATION. IF THIS OCCURS, THE VEHICLE WILL ILLUMINATE THE CHECK ENGINE LIGHT.
G0G_REGION LETTE2017-05-25. Service bulletin. ELECTRICAL SYSTEM. REGION EMAIL: THE SUBJECT VEHICLES ARE EQUIPPED WITH AN OXYGEN SENSOR WHICH COULD EXPERIENCE WIRE DEGRADATION INSIDE THE OXYGEN SENSOR WIRING HARNESS CAUSED BY VEHICLE VIBRATION DURING NORMAL OPERATION. IF THIS OCCURS, THE VEHICLE WILL ILLUMINATE THE CHECK ENGINE LIGHT.
T-TT-0399-162017-05-22. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM. TT: MULTIMEDIA SYSTEMS RESET PROCEDURE SHOULD BE PERFORMED WHEN THE MULTIMEDIA SYSTEM NO LONGER RESPONDS OR REBOOTS ITSELF.
T-TT-0339-152017-04-07. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. 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-0268-13 REV2017-04-07. Service bulletin. EQUIPMENT. "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-0026-162017-04-06. Service bulletin. ELECTRICAL SYSTEM; VEHICLE SPEED 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-0024-162017-04-06. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. 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-SB-0049-162017-04-05. Service bulletin. ELECTRICAL SYSTEM. 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-0044-162017-04-04. Service bulletin. EQUIPMENT. 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-0026-14 REV2017-03-30. Service bulletin. TIRES. "TSB: DURING THE MANUFACTURING PROCESS TIRES ARE MOUNTED ON THE VEHICLE AS MATCHED SETS TO HELP REDUCE CONDITIONS SUCH AS PULLING OR DRIFTING. IF THE WHEELS ARE REPLACED OR REFINISHED BEFORE VEHICLE DELIVERY, IT IS IMPORTANT THAT THE TIRES REMAIN ON THE VEHICLE IN THE SAME LOCATION AND IN THE SAME DIRECTION OF ROTATION. PLEASE REFER TO THE FOLLOWING PROCEDURE TO ENSURE THAT THE ORIGINAL TIRES STAY IN THE SAME LOCATION ON THE VEHICLE."
T-SB-0071-152017-03-29. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. "TSB: THE RADIO ANTENNA POLE ON SOME MODELS IS DESIGNED WITH A HEX-CUT BASE AND REQUIRES INSTALLATION USING AN 8 MM WRENCH. WHEN PERFORMING PDS OR INSTALLING THE ANTENNA POLE FOR ANY OTHER REASON, INSPECT THE ANTENNA BASE FOR A HEX-CUT TO DETERMINE IF THE FOLLOWING PROCEDURE IS REQUIRED."
T-TT-0344-15 REV2017-03-28. Service bulletin. EQUIPMENT. TT: IPHONE TEXT MESSAGES DO NOT APPEAR ON MULTIMEDIA DIS[PLAY.
T-TT-0360-152017-03-28. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. TT: 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. THE CUSTOMER MAY COMPLAIN OF THE FOLLOWING ISSUES: WHEN RECEIVING TWO INCOMING CALLS SIMULTANEOUSLY, BOTH CALLS ARE ENDED AUTOMATICALLY. ITUNES RADIO APP DOES NOT PLAY VIA BLUETOOTH AUDIO. PODCAST AND AUDIOBOOK MEDIA PLAYBACK IS INOPERATIVE VIA BLUETOOTH AUDIO.
OP-W-04232017-03-27. Service bulletin. STEERING:AUTOMATED/ADAPTIVE STEERING. OEM TORQUE SPECIFICATIONS FOR THE STEERING SHAFT HAVE BEEN IDENTIFIED AND ARE NOW BEING USED IN THE INSTALLATION OF THE VMI STEERING EXTENSION. THIS SB NOTIFIES THE TECHNICIANS TO ENSURE THE TORQUE SPECIFICATIONS FOR THE STEERING EXTENSION HAVE BEEN COMPLIED WITH AT THE FACTORY. THIS WILL BRING THE VAN INTO CONFORMANCE WITH VMI UPDATED PROCESSES
OP-W-04222017-03-27. Service bulletin. EQUIPMENT. THIS SB NOTIFIES THE TECHNICIANS OF THE AVAILABILITY OF AN UPGRADED DOOR OPEN LIMIT SWITCH. IT'S MORE ROBUST DESIGN MAKES IT EASIER TO ADJUST AND HOLDS THE ADJUSTMENT IN PLACE REDUCING OR ELIMINATING INCORRECT SIGNALLING TO THE VMI AND OEM COMPUTER
T-TT-0309-14 REV2017-03-24. Service bulletin. EQUIPMENT:ELECTRICAL. TT: SOME CUSTOMERS MAY EXPERIENCE BLUETOOTH DISCONNECTIONS OR LOSS OF SMS TEXT MESSAGE FUNCTIONALITY ON THE NAVIGATION/AUDIO SYSTEM WITH ANDROID PHONES RUNNING OS 4.4 OR LATER. CONDITION TENDS TO OCCUR TO CUSTOMERS WHO HAVE MANY PREVIOUS TEXT MESSAGES ON THEIR PHONES.
T-SB-0028-142017-03-23. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. "TSB: LONG-TERM OR OFF-SITE STORAGE REQUIRES SPECIAL CARE TO KEEP VEHICLES FACTORY FRESH AND READY FOR DELIVERY. THE FOLLOWING GUIDELINES SHOULD BE PERFORMED TO MINIMIZE VEHICLE COMPONENT/PART DEGRADATION DUE TO EXTENDED VEHICLE STORAGE CONDITIONS. LONG-TERM STORAGE CAN AFFECT A VEHICLE’S SYSTEMS AND COMPONENTS. ANY PROBLEMS THAT ARE FOUND SHOULD BE CORRECTED IMMEDIATELY."
T-TT-0381-162017-03-21. Service bulletin. EQUIPMENT. TECH TIP: SOME CUSTOMERS MAY EXPERIENCE DIFFICULTY PROGRAMMING HOMELINK.
T-SB-0012-13 REV2017-03-21. 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."

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