Toyota RAV4 Prime 2021 — technical service bulletin
Bulletin TSB004222 · NHTSA communication 10214364 · issued Apr 19, 2022
Technical service bulletin
communication type
Visibility
component
2021
model years
1
vehicle entries
Official summary
TSB: Some 2021 model year RAV4 Prime vehicles may exhibit a short humming/buzzing noise upon startup (Ready ON) with the compressor on. Follow the Repair Procedure in this bulletin to address this condition.
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.