Toyota Avalon 2018–2020 — technical service bulletin
Bulletin T-TT-0551-19 · NHTSA communication 10162791 · issued Jun 20, 2019
Technical service bulletin
communication type
Equipment
component
2018–2020
model years
14
vehicle entries
Official summary
TT: Some customers may experience an Entune? update pop-up message after every key cycle.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.