Toyota Avalon 2018–2019 — technical service bulletin
Bulletin T-TT-0511-18 · NHTSA communication 10152168 · issued Nov 2, 2018
Technical service bulletin
communication type
Equipment
component
2018–2019
model years
4
vehicle entries
Official summary
TT: Vehicle control apps might not operate as expected at times due to preconditions (normal operating parameters) not being established, vehicle settings and/or network/cellular coverage concerns.
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.