Honda Accord 2018–2020 — technical service bulletin
Bulletin A21-085 · NHTSA communication 10205951 · issued Dec 23, 2021
Technical service bulletin
communication type
Electrical System
component
2018–2020
model years
8
vehicle entries
Official summary
Service Bulletin - In February of 2022, the 3G network will no longer support the in-vehicle services that the vehicle has previously supported. The Telematics Control Unit (TCU) using the Over the Air (OTA) update is required to connect to the VoLTE network to continue communications.
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.