Porsche 911 2019–2021 — technical service bulletin
Bulletin No. 2229 · NHTSA communication 10222547 · issued Sep 28, 2022
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
8
vehicle entries
Official summary
Instructions on advanced technical information for the Cayenne and 911 - conbox current draw discharges 12v battery
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.