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Service bulletin T-TT-0665-21 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 id10202492
Published by NHTSA2021-10-25
Manufacturer's numberT-TT-0665-21 Rev
Manufacturer's date2021-09-21
NHTSA componentFUEL SYSTEM, GASOLINE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

TT: Special Service Campaign 21TC05 applies to the following condition: The fuel gauge needle and the ?distance to empty? estimated in the vehicle display accurately indicate the approximate amount of remaining fuel in the fuel tank. However, some drivers are continuing to drive after the low fuel light illuminates, causing them to potentially run out of fuel and be inconvenienced. NOTE: Highlander HV fuel gauge issues, such as, fuel gauge not reading full or tank capacity does not meet expectations DO NOT apply to 21TC05.

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, Fuel system

Vehicles listed
TOYOTA HIGHLANDER2020, 2021

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

Recalls for the same vehicles and component
20V1620002020-03-19. ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY

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
22TD022025-04-08. Service bulletin. TECHNICAL INSTRUCTIONS LIMITED SERVICE CAMPAIGN 22TD02 FUEL INLET HOUSING CERTAIN 2021 MODEL YEAR HIGHLANDER CERTAIN 2021 MODEL YEAR HIGHLANDER HYBRID
22TD022025-04-08. Service campaign. 22TD02 expired on 2/7/2025 A seam near the fuel inlet may not have been properly sealed during manufacturing. This can allow water to leak into the interior area of the vehicle, behind the third-row seat, when the vehicle is exposed to wet environmental conditions like rain or a car wash.
22TD022025-03-11. Service bulletin. TECHNICAL INSTRUCTIONS LIMITED SERVICE CAMPAIGN 22TD02 FUEL INLET HOUSING CERTAIN 2021 MODEL YEAR HIGHLANDER CERTAIN 2021 MODEL YEAR HIGHLANDER HYBRID
22TD022025-03-11. Service campaign. 22TD02 expired on 2/7/2025 A seam near the fuel inlet may not have been properly sealed during manufacturing. This can allow water to leak into the interior area of the vehicle, behind the third-row seat, when the vehicle is exposed to wet environmental conditions like rain or a car wash.
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.
TSB0032202023-10-16. Service bulletin. TSB: Replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) (see Figure 1) for most 1979 ? 2023 model year vehicles may be available provided the requests meet the criteria listed in this Service Bulletin. Follow the Procurement Procedure in this bulletin to request a replacement certification label or VIN plate.
TSB-0033-232023-07-31. Service bulletin. TSB: Some 2020 ? 2023 model year Highlander Hybrid and 2021 ? 2023 model year RAV4 Hybrid, RAV4 Prime, Sienna Hybrid, and Venza Hybrid vehicles may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: ?P24517F ? Evaporative Emission System Switching Valve Actuator Stuck Off. ?P14502A ? Fuel Tank Pressure Sensor Signal Stuck in Range.
T-SB-0057-182023-06-26. Service bulletin. 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.
23TE01 Dealer Pa2023-05-15. Service bulletin. DP: Although the high-pressure fuel pump is covered by Toyota?s New Vehicle Limited Warranty for 5 years or 60,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to the presence of a fuel odor in or around the engine bay originating at the high-pressure fuel pump of the subject vehicles.
T-SB-0115-22 Rev2023-04-17. Service bulletin. TSB: Some 2019 ? 2022 model year Avalon, 2018 ? 2023 model year Camry, 2017 ? 2022 model year Highlander, and 2017 ? 2020 model year Sienna vehicles equipped with a 2GR-FKS engine may exhibit a knocking noise from the vacuum pump at idle.