Toyota Avalon 2017–2021 — technical service bulletin
Bulletin T-TT-0673-21 · NHTSA communication 10204561 · issued Nov 12, 2021
Technical service bulletin
communication type
Suspension
component
2017–2021
model years
10
vehicle entries
Official summary
TT: Vehicle has an abnormal noise condition when going over speed bumps or irregular roads. Noise is coming from front shock absorber
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.