Service bulletins for the 2020 Porsche Cayenne
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
921 on file from NHTSA, as of 2026-10-19.
About C1103 on the 2020 Porsche Cayenne: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: C1103 are shown. Show all
| 2121.4 | 2026-08-05. Service bulletin. VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. ACC Dynamic Calibration Fault C110300 |
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| No. 2121.3 | 2025-08-04. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Instructions on advanced technical information for the Cayenne - ACC Dynamic Calibration Fault C110300 |
| No. 2121.2 | 2024-08-06. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; ELECTRICAL SYSTEM. Instructions on advanced technical information for the Cayenne - dynamic calibration fault C110300 |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.