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Service bulletins for the 2018 Toyota Avalon

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.

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

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Bulletins, newest first
Toyota Safety Re2019-01-07. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
TTT043217 Rev12018-12-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: Some Customers may complain about a Hybrid Vehicle Battery cooling system warning message. This warning message may appear when the HV Battery cooling system loses efficiency due to debris on the filter and or some object obstructing the air inlet.
TTT0432172018-12-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: Some Customers may complain about a Hybrid Vehicle Battery cooling system warning message. This warning message may appear when the HV Battery cooling system loses efficiency due to debris on the filter and or some object obstructing the air inlet.
Toyota Safety Re2018-12-17. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-SB-0279-17_Rev2018-12-17. Service bulletin. ELECTRICAL SYSTEM. TSB: REVISION NOTICE November 13, 2018 Rev2: ? The entire bulletin has been updated. March 16, 2018 Rev1: ? Applicability has been updated to include 2018 model year vehicles. ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. T-SB-0103-16 and T-SB-0337-17. ? The entire bulletin has been updated. Service Bulletin No. T-SB-0103-16 and T-SB-0337-17 are obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Some 2016 ? 2018 model year vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (version 010171, 010170, or 01017D) may exhibit one or more of the following conditions: ? Head unit reboots at a specific location ? Abnormal Destination Search app operation ? Rebooting caused by no songs on the USB-connected iPhone ? A one-time reboot after ignition is cycled to ACC-ON ? Audio stays muted after the key is cycled
T-TT-0511-182018-12-17. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL. TT: Vehicle control apps might not operate as expected at times due to preconditions (normal operating parameters) not being established, vehicle settings and/or network/cellular coverage concerns.
T-SB-0337-17-Obs2018-12-17. Service bulletin. EQUIPMENT. TSB: OBSOLETE NOTICE March 21, 2018: This bulletin is now obsolete. Please see T-SB-0279-17.
T-SB-0279-17-Rev2018-12-17. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT:ELECTRICAL. TSB: REVISION NOTICE March 16, 2018 Rev1: ? Applicability has been updated to include 2018 model year vehicles. ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0103-16 and T-SB-0337-17. ? The entire bulletin has been updated. Service Bulletin No. T-SB-0103-16 and T-SB-0337-17 are obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Some 2016 ? 2018 model year vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (version 010171, 010170, or 01017D) may exhibit one or more of the following conditions: ? Head unit reboots at a specific location ? Abnormal Destination Search app operation ? Rebooting caused by no songs on the USB-connected iPhone ? A one-time reboot after ignition is cycled to ACC-ON ? Audio stays muted after the key is cycled
T-TT-0484-18 Rev2018-12-17. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. TT: Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low. These settings may need to be reapplied any time the phone is paired to a new head unit, a phone update is applied, or the phone is un-paired and re-paired.
T-TT-0414-16-Rev2018-12-03. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as 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-TT-0503-182018-12-03. Service bulletin. LANE DEPARTURE: BLIND SPOT DETECTION. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
T-TT-0503-182018-11-26. Service bulletin. LANE DEPARTURE: BLIND SPOT DETECTION. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
T-SB-0313-172018-11-05. Service bulletin. SERVICE BRAKES. TSB: Some 2015 ? 2018 model year Toyota vehicles may exhibit brake vibration due to improper lug nut torque. Brake vibration can occur at any time if improper torque is applied to lug nuts. Even one lug nut over or under torqued can cause vibration.
Safety Recall an2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Update on Technician Certification Requirements.
PG006-01-Obsolet2018-10-15. Service bulletin. EQUIPMENT:OTHER:LABELS; EQUIPMENT. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
PG004-97-Obsolet2018-10-15. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:LABELS. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
Toyota Safety Re2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-TT-0503-18_Rev2018-10-15. Service bulletin. LANE DEPARTURE; VISIBILITY. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
Technician Certi2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-SB-0304-17_Rev2018-08-20. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE July 31, 2018 Rev2: ? The Supersession Notice has been updated. January 11, 2018 Rev1: ? The Supersession Notice has been updated. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, and T-SB-0144-08. Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, and T-SB-0144-08 are obsolete and any printed versions should be discarded. Vehicle replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) may be available from Toyota, provided the request meets one of the criteria listed in this Service Bulletin. Replacement Certification Label and VIN Plate Criteria A replacement certification label and/or VIN plate may be requested if: ? The vehicle was in an accident and the label and/or plate is damaged or attached to a part that will be replaced during the repair. ? The label and/or plate was stolen.
T-SB-0057-182018-08-20. Service bulletin. EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0043-14. ? Applicability has been updated to include 2017 ? 2018 model year Toyota vehicles. Service Bulletin No. T-SB-0043-14 is obsolete and any printed versions should be discarded. 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 New security provisions are required to obtain a reset passcode. It is critical to review the instructions for this new process BEFORE attempting to get a passcode in the new system.
T-TT-0442-172018-07-02. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL; 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 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.
T-TT-0441-172018-07-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TT: During previous air conditioning service, leakage prevention agent (A/C stop leak) may have been added to the A/C system. Adding stop leak products to the A/C system is not a recommended or approved Toyota repair process. During A/C service, moisture enters the A/C system, and can react with the previously added A/C stop leak, forming a gelatinous substance. The gel substance that forms can cause the A/C compressor to bind and or seize.
T-SB-0039-182018-06-18. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0151-13. * Applicability has been updated to include 2016 - 2018 model year Avalon and Avalon HV and 2017 model year Camry and Camry HV vehicles. Service Bulletin No. T-SB-0151-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Some 2012 - 2017 model year Camry, Camry HV, and 2013 - 2018 Avalon and Avalon HV vehicles produced in North American may exhibit a knocking, popping, ticking, or snapping noise from the moonroof area while driving. Follow the Repair Procedure in this bulletin to address this condition.
Toyota Safety Re2018-06-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Safety Recall and Service Campaign - Technician Certification Requirements.

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