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Service bulletin T-TT-0673-21 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 id10204570
Published by NHTSA2021-12-13
Manufacturer's numberT-TT-0673-21 Rev
Manufacturer's date2021-11-23
NHTSA componentSUSPENSION:FRONT:SHOCK ABSORBER

NHTSA's summary

TT: Vehicle has an abnormal noise condition when going over speed bumps or irregular roads. Noise is coming from front shock absorber

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

Suspension, Shocks and struts

Vehicles listed
TOYOTA AVALON2017, 2018, 2019, 2020, 2021
TOYOTA AVALON HYBRID2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)

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