Friday, August 7, 2026
RecallGazette

Vehicle problems, recalls & safety intelligence

Ford C-Max Energi 2014–2020technical service bulletin

Bulletin 21B09-S1 · NHTSA communication 10216851 · issued Jul 28, 2022

Technical service bulletin
communication type
Communication
component
2014–2020
model years
25
vehicle entries

Official summary

Certain 2014-2020 Model Year Multiple Vehicle Lines - 3G Telematics Control Unit to 4G Upgrade Kit. The North America 3G cellular service began decommissioning in August 2021 and a complete shutdown of the 3G network took place in February 2022. Vehicles on the road equipped with a 3G telematics control unit (TCU) / embedded modem will lose mobile app functionality/connectivity.

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.