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Service bulletin T-TT-0484-18 Rev

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10152109
Published by NHTSA2018-12-17
Manufacturer's numberT-TT-0484-18 Rev
Manufacturer's date2018-03-09
NHTSA componentEQUIPMENT:ELECTRICAL; EQUIPMENT

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Vehicles listed
TOYOTA 4RUNNER2017, 2018
TOYOTA AVALON2017, 2018
TOYOTA HIGHLANDER2016, 2017, 2018
TOYOTA PRIUS2016, 2017, 2018
TOYOTA PRIUS V2016, 2017
TOYOTA PRIUS V2018 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA SEQUOIA2016, 2017, 2018
TOYOTA SIENNA2016, 2017, 2018
TOYOTA TACOMA2016, 2017, 2018
TOYOTA TUNDRA2016, 2017, 2018
TOYOTA YARIS2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
25V8760002025-12-17. EQUIPMENT ADAPTIVE/MOBILITY:WHEELCHAIR RESTRAINTS/SECUREMENT:LATCH/ANCHOR:
20194282019-08-23. Accessories
19V5030002019-06-28. EQUIPMENT:OTHER:LABELS
18V7530002018-10-25. EQUIPMENT:OTHER:LABELS
18V7110002018-10-11. EQUIPMENT:OTHER:LABELS
17V8310002017-12-20. EQUIPMENT:OTHER:LABELS
17V5200002017-08-23. EQUIPMENT
17V4250002017-07-03. EQUIPMENT; STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS
17V2910002017-05-01. EQUIPMENT
16V4200002016-06-09. EQUIPMENT:OTHER:LABELS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB0106222024-04-01. Service bulletin. TSB: Some 2018 ? 2022 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update, however, the process for generating license keys differs from previous generations. Before attempting to perform a map update, the expiration date of the dynamic subscription (stored in the head unit), must be checked. If the expiration date has not passed, a license key may be generated without the purchase of an Activation Card Number (ACN). Updating the map without the use of an ACN is considered an Embedded Navigation Update (refer to pg. 10) and performing this update does not extend the subscription to dynamic map services. If the subscription period has expired, or is expiring within the next 90 days, it should be recommended to the customer to purchase an ACN. Utilizing an ACN, will initiate the Dynamic Navigation Update (refer to pg. 4). This Dynamic Navigation Update will perform the embedded navigation update and provide dynamic map services for a period of two years from the date that the Dynamic Navigation Update is performed. ACNs are provided in a pamphlet available through the normal parts ordering system. Follow the process in this bulletin to perform the update.
20TD01a2024-04-01. Service bulletin. TI: 20TD01 Expired on March 31, 2023 TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN 20TD01 POTENTIALLY INCORRECT CARPET FLOOR MATS CERTAIN 2012-2019 Sequoia
20TD012024-04-01. Service bulletin. DP: 20TD01 Expired on March 31, 2023 There is a possibility that some of the involved 2012-2019 Sequoias received a Toyota Genuine carpet floor mat set that is designed for different model year Sequoia vehicles (model years 2008-2011). If installed, the driver?s floor mat would not be secured in the way it was designed due to differences in the attachment grommets
K0D_TIS_ProgramO2024-03-18. Service bulletin. K0D expired on 10/31/2023.
K0D_TIS_Technica2024-03-18. Service bulletin. TI: K0D expired on 10/31/2023. TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN K0D FRAME CORROSION RESISTANT COMPOUND (CRC) APPLICATION CERTAIN 2011 ? 2015 MODEL YEAR TACOMA
T-SB-0043-142024-03-04. Service bulletin. OBSOLETE NOTICE January 22, 2024: This bulletin is now obsolete. Please see T-SB-0057-18.
TSB0026202023-12-26. Service bulletin. TSB: All 2020 ? 2023 model year 4Runner, 2018 ? 2022 model year Sequoia, 2018 ? 2023 model year Tacoma, and 2018 ? 2021 model year Tundra vehicles are equipped with Pre-collision System (PCS) and Dynamic Radar Cruise Control (DRCC) as part of the Toyota Safety Sense (TSS) package. The PCS and DRCC systems are designed to help mitigate a potential collision and maintain a pre-determined traveling distance. It is recommended to disable the PCS and DRCC systems on vehicles that have been modified (ride height, oversized wheels/tires, brush bars, etc.) in a way that potentially disrupts the functionality of these systems. Vehicle owner?s written consent is required before performing the calibration to permanently disable the PCS and DRCC systems. Follow the Repair Procedure in this bulletin to disable the PCS and DRCC systems.
23TE08-22023-12-04. Service bulletin. FAQ: Certain 2016-2022 Model Year Tacoma Vehicles Painted with Super White (040) Paint Color Coverage for Paint Peeling on Door Frames + Front Inner Fenders Frequently Asked Questions
23TE08-12023-12-04. Service bulletin. RL: Toyota has received some reports of paint peeling along the exterior door window frames and front inner fenders under the hood on certain Tacoma vehicles with 040 Super White paint color.
23TE082023-12-04. Service bulletin. DP: Toyota has received some reports of paint peeling along the exterior door window frames and front inner fenders under the hood on certain Tacoma vehicles with 040 Super White paint color.