Porsche Macan 2019 — technical service bulletin
Bulletin No. 39-21 · NHTSA communication 10191726 · issued Apr 8, 2021
Technical service bulletin
communication type
Electrical System
component
2019
model years
2
vehicle entries
Official summary
Instructions on how to reprogram the Central computer (PCM) using an SD card.
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.