Toyota Yaris 2018–2020 — technical service bulletin
Bulletin T-TT-0667-21 · NHTSA communication 10203531 · issued Oct 1, 2021
Technical service bulletin
communication type
Suspension
component
2018–2020
model years
3
vehicle entries
Official summary
TT: **Puerto Rico Only** Vehicle has abnormal noise condition when going over speed bumps or irregular roads. Noise is coming from strut support and bearing
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.