Porsche Cayenne 2019–2025 — technical service bulletin
Bulletin 2121.4 · NHTSA communication 11035741 · issued Jul 29, 2026
Technical service bulletin
communication type
Vehicle Speed Control
component
2019–2025
model years
7
vehicle entries
Official summary
ACC Dynamic Calibration Fault C110300
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.