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Service bulletin T-TT-0642-21

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 id10188923
Published by NHTSA2021-03-15
Manufacturer's numberT-TT-0642-21
Manufacturer's date2021-02-15
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

TT: Customers may state the vehicle has oil consumption or certain warnings have illuminated stating low oil, ?Oil level at minimum, add one quart? as stated on MID.

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

Engine

Vehicles listed
TOYOTA SUPRA2021

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

Recalls for the same vehicles and component
21V5980002021-08-02. ENGINE

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
T-PANT-2024-004-2024-04-15. Service bulletin. This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the Toyota Complete Maintenance Care (TCMC) website.
21TC02_Dealer_Le2021-11-15. Service bulletin. DL: Due to a software error in the battery management system of the 12V battery located under the vehicle?s hood, the engine auto Stop/Start functionality could become deactivated.
21TC02_Region_Le2021-11-15. Service bulletin. RL: Due to a software error in the battery management system of the 12V battery located under the vehicle?s hood, the engine auto Stop/Start functionality could become deactivated.
T-TT-0642-21 Rev2021-04-19. Service bulletin. TT: Customers may state the vehicle has oil consumption or certain warnings have illuminated stating low oil, ?Oil level at minimum, add one quart? as stated on MID.
T-TT-0628-202020-11-30. Service bulletin. TT: HVAC drain tube is found to be blocked/clogged.
T-TT-0468-17 Rev2020-08-17. Service bulletin. TT: HVAC drain tube is found to be blocked/clogged.