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RecallGazette

Vehicle problems, recalls & safety intelligence

Toyota Avalon 2020–2023technical service bulletin

Bulletin T-TT-0678-21 Rev · NHTSA communication 10230371 · issued Dec 15, 2022

Technical service bulletin
communication type
Equipment
component
2020–2023
model years
27
vehicle entries

Official summary

TT: Some 19CY LG DCM equipped vehicles may not be able to complete the firmware update due to not having an active account or waived services during the trial. Follow the steps below to enable ?Temp DCM Activation?.

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.