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Service bulletin No. 2121.2

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11005768
Published by NHTSA2024-08-06
Manufacturer's numberNo. 2121.2
Manufacturer's date2024-07-17
NHTSA componentFORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; ELECTRICAL SYSTEM

NHTSA's summary

Instructions on advanced technical information for the Cayenne - dynamic calibration fault C110300

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance, Electrical system, Adaptive cruise control

Trouble codes named

C1103

Vehicles listed
PORSCHE CAYENNE2019, 2020, 2021, 2022, 2023
PORSCHE CAYENNE E-HYBRID2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GT2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S E-HYBRID2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO COUPE2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO GT2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S E-HYBRID2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S HYB COUPE2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE redundant CAYENNE E-HYBRID2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
No. 11-25-42026-09-04. Service bulletin. Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Control Unit
2121.42026-08-05. Service bulletin. ACC Dynamic Calibration Fault C110300
No. 11-252026-01-06. Service bulletin. Technical information for Various Error Messages Regarding Driver Assistance Systems in the Instrument Cluster in Conjunction With Passive Fault Memory Entries in the Driver Assistance Systems Control Unit - ZFAS
No. 2121.32025-08-04. Service bulletin. Instructions on advanced technical information for the Cayenne - ACC Dynamic Calibration Fault C110300