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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-TT-0377-152017-03-02. Service bulletin. EQUIPMENT. TT: SOME CUSTOMERS MAY EXPERIENCE POOR OUTGOING BLUETOOTH SOUND QUALITY, THIS CAN OCCUR FOR VARIOUS REASONS. CURRENT MULTIMEDIA SYSTEMS ARE DESIGNED WITH THE ABILITY TO ADJUST BLUETOOTH SOUND QUALITY TO COMPENSATE FOR ECHO OR EXCESSIVE BACKGROUND NOISE.
T-SB-0124-152017-03-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. "A BATTERY IN A STORED VEHICLE IS SUBJECT TO CONDITIONS THAT CAN REDUCE ITS PERFORMANCE AND LIFE. THESE CONDITIONS INCLUDE STORAGE PERIOD, TEMPERATURE, PARASITIC DRAIN, AND BATTERY LOAD. BECAUSE OF THESE FACTORS, BATTERY INSPECTION AND MAINTENANCE ARE REQUIRED IN ORDER TO ENSURE PROPER OPERATION AND OPTIMAL BATTERY LIFE. AS A MATTER OF POLICY, TOYOTA DOES NOT PROVIDE BATTERY WARRANTY COVERAGE FOR DISCHARGED AND/OR FAILED BATTERIES DUE TO LACK OF MAINTENANCE. IT IS THE DEALER’S RESPONSIBILITY TO MAINTAIN THE SPECIFIED STATE OF CHARGE (SOC) OF THE VEHICLE’S BATTERY WHILE IN STOCK AND ASSURE PROPER STATE OF CHARGE (SOC) AT DELIVERY. TO ELIMINATE CUSTOMER SERVICE CONCERNS DUE TO AN UNDERCHARGED BATTERY DURING THE FIRST FEW WEEKS OF OWNERSHIP, ALL DEALERS SHOULD CHECK BATTERY STATE OF CHARGE (SOC) AND RECHARGE, IF NECESSARY, WITHIN 48 HOURS OF DELIVERY TO CUSTOMERS."
T-TT-0385-162017-03-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. "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. "
T-SB-0008-162017-02-27. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. "TSB: PRE-DELIVERY SERVICE (PDS) IS A CRITICAL STEP IN SATISFYING OUR NEW CAR CUSTOMERS. CUSTOMER FEEDBACK INDICATES THE FOLLOWING AREAS DESERVE SPECIAL ATTENTION WHEN PERFORMING PDS: • CAREFUL INSPECTION FOR PAINT CHIPS/SCRATCHES AND BODY DENTS/DINGS. • PROPER OPERATION OF ELECTRICAL ACCESSORIES (INCLUDING INTERIOR LIGHT, CLOCK, AND RADIO RESET). • INTERIOR CLEANLINESS • PROPER FUNCTION OF MECHANICAL SYSTEMS. CUSTOMER RETENTION AND PROPER MAINTENANCE OF VEHIUCLES HAS BEEN A MAJOR FOCUS FOR TOYOTA. TO HELP REMIND CUSTOMERS THAT REGULAR OIL CHANGES ARE ESSENTIAL TO THE PROPER MAINTENCE OF THEIR VEHICLE, INSTALLING A FIRST OIL CHANGE REMINDER STICKER IS REQUIRED PRIOR TO DELIVERY. BY DOING THIS, CUSTOMERS WILL BE REMINDED TO RETURN TO A DEALERSHIP FOR THEIR FIRST OIL CHANGE. YOUR CURRENT OIL CHANGE REMINDER STICKER MAY BE USED. (SEE PDS CHECK SHEET ITEM 9 OF “FINAL INSPECTION & CLEANING.”) A NEW PDS CHECK SHEET HAS BEEN DEVELOPED FOR THE 2016 MODEL YEAR SIENNA. SOME CHECK POINTS HAVE BEEN ADDED, EXPANDED, OR CLARIFIED. BULLETING ARE AVAILABLE FOR ITEMS IN BOLD TYPE. "
T-SB-0007-162017-02-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. PRE-DELIVERY SERVICE CHECK SHEET
T-SB-0006-162017-02-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TSB: AS A RESULT OF THE REMOVAL OF THE SHORT PIN, THE POWER SOURCE TO THE STEERING ANGLE SENSOR IS CUT OFF. WHEN THE SHORT PIN IS REINSTALLED, THE PARKING ASSIST MONITOR SYSTEM WILL BE OPERATIVE, BUT IT CANNOT DISPLAY GUIDELINES TO ASSIST PARKING OPERATION BECAUSE THE CENTER POSITION IS NOT RECOGNIZED BY THE STEERING ANGLE SENSOR. PLEASE INITIALIZE THE PARKING ASSIST MONITOR SYSTEM AFTER INSTALLING THE SHORT PIN DURING PRE-DELIVERY SERVICE (PDS).
DEN-N3D7B-062017-02-24. Service bulletin. AIR BAGS. THIS COMMUNICATION IS INFORMING TOYOTA OF A DELAMINATION ISSUE WITHIN AN I.C. PRODUCED BY NXP AND ASSEMBLED INTO AIRBAG SENSOR SUPPLIED BY DENSO INTERNATIONAL AMERICA, INC. THIS DELAMINATION ISSUE MANIFESTS ITSELF AS AN OPEN CIRCUIT WITHIN THE SENSOR, CAUSING A DTC TO BE SET ON THE VEHICLE ALONG WITH A DECLARING “AIRBAG” LIGHT.
T-SB-0026-162017-02-23. Service bulletin. VEHICLE SPEED CONTROL; EQUIPMENT. 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.
G0G_TI_SIENNA2017-02-15. Service bulletin. EQUIPMENT. 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.
T-SB-0049-16 REV2017-01-04. 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.
G0G_TI2016-12-20. Service bulletin. ELECTRICAL SYSTEM; 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.
T-SB-0049-16 REV2016-12-14. Service bulletin. EQUIPMENT. 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-0103-162016-11-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TSB: SOME 2016 MODEL YEAR APPLICABLE VEHICLES EQUIPPED WITH ENTUNE™ AUDIO (VERSION 01013E) / ENTUNE™ AUDIO PLUS (VERSION 010156 OR 01015C) / ENTUNE™ PREMIUM AUDIO (VERSION 010171 OR 010170 OR 01017D) MAY EXHIBIT ONE OR MORE OF THE FOLLOWING CONDITIONS: *HEAD UNIT REBOOTING AT A SPECIFIC LOCATION. *ABNORMAL DESTINATION SEARCH OPERATION. *REBOOTING CAUSED BY NO SONGS ON THE USB CONNECTED IPHONE. *ONE TIME REBOOT AFTER ACC-ON. *AUDIO STAYS MUTED AFTER THE KEY IS CYCLED.
OP-W-04232016-11-16. Service bulletin. 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-04222016-11-16. Service bulletin. STRUCTURE:BODY:DOOR. 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 CONCERNING THE STATUS OF THE PASS. SIDE SLIDING DOOR
T-SB-0045-14 REV2016-11-16. Service bulletin. SERVICE BRAKES. "TSB: REVISION NOTICE - AUGUST 2, 2016 REV1 - APPLICABILITY HAS BEEN UPDATED TO INCLUDE 2015 - 2016 MODEL YEAR SIENNA VEHICLES. ANY PREVIOUS PRINTED VERSIONS OF THIS BULLETIN SHOULD BE DISCARDED. SOME 2011 – 2016 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. NEW FRONT BRAKE PADS AND A NEW FIELD FIX REPAIR PROCEDURE HAVE BEEN DEVELOPED TO IMPROVE THIS CONDITION. "

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