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Service bulletin No. 75-25-1

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 id11026410
Published by NHTSA2025-12-05
Manufacturer's numberNo. 75-25-1
Manufacturer's date2025-11-26
NHTSA componentFORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: WARNINGS; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING

NHTSA's summary

Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems

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, Adaptive cruise control, Lane departure and lane keeping

Trouble codes named

C12D5

Vehicles listed
PORSCHE CAYENNE2024, 2025, 2026
PORSCHE CAYENNE COUPE2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE E-HYBRID2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE E-HYBRID COUPE2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S COUPE2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO E-HYBRID2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO GT2024 (the catalog's model; the bulletin names a series or trim of it)

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. 2606-12026-09-04. Service bulletin. Information on Advanced Technical Information for E3II V8 Cayenne – Various Assistance System Warning Messages in the Instrument Cluster due to Implausible Drivetrain Coordinator Status
No. 26062026-09-04. Service bulletin. Information on Advanced Technical Information for E3II V8 Cayenne – Various Assistance System Warning Messages in the Instrument Cluster due to Implausible Drivetrain Coordinator Status
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. 2503.32025-12-05. Service bulletin. Instructions on advanced technical information for Troubleshooting Advanced Driver Assistance Systems (ADAS)
No. 2503.22025-08-06. Service bulletin. Instructions on advanced technical information for troubleshooting ADAs systems
No. 2121.32025-08-04. Service bulletin. Instructions on advanced technical information for the Cayenne - ACC Dynamic Calibration Fault C110300
No. 2503.12025-07-09. Service bulletin. Instructions on advanced technical information for the advanced driver assistance systems. Please refer to PDF attached for more information regarding this.
No. 11-252025-04-07. Service bulletin. Technical Information - Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster / Passive Fault Memory Entry "C12D5FA" in the Driver Assistance System Control Unit (ZFAS) (11/25)