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Service bulletin WPH4

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 id10243638
Published by NHTSA2023-10-05
Manufacturer's numberWPH4
Manufacturer's date2023-09-12
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Porsche intranet posting with information on recoding control unit for assistance systems - WPH4

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

Electrical system

Vehicles listed
PORSCHE 9112021, 2022, 2023
PORSCHE 911 4S2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA T2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 DAKAR2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT32021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 42021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 42023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO S2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE2021, 2022, 2023
PORSCHE CAYENNE E-HYBRID2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GT2021, 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 S2021, 2022, 2023 (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 GT2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S E-HYBRID2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN2021, 2022, 2023
PORSCHE TAYCAN 4 CROSS TURISMO2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN 4S2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN 4S CROSS TURISMO2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN CROSS TURISMO2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN GTS2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN GTS SPORT TURISMO2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO CROSS TURISM2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO S2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO S CROSS TURI2023 (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.

Recalls for the same vehicles and component
24V7320002024-10-01. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY; ELECTRICAL SYSTEM:SOFTWARE
24V7310002024-10-01. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY; ELECTRICAL SYSTEM:SOFTWARE
24V2170002024-03-20. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
24V2150002024-03-20. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
23V8410002023-12-13. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:CABLE/CORD:ONBOARD
23V8400002023-12-13. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
23V6150002023-09-01. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
23V3470002023-05-16. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; SERVICE BRAKES, HYDRAULIC
23V1760002023-03-17. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; SEAT BELTS:FRONT:WARNING LIGHT/DEVICES
21V4860002021-06-29. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION MOTOR:CONTROLLER:SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
GR13D8042026-10-02. Service bulletin. Parts Information for Parts Withdrawal - High-Voltage Heating (PTC)
WTL22026-10-02. Service campaign. Porsche intranet posting for Campaign WTL2 – Replacing Electric Passenger Compartment Heater
No. WTL22026-10-02. Service campaign. Technical Information for Campaign WTL2 – Replacing Electric Passenger Compartment Heater
WTK42026-10-02. Service campaign. Porsche intranet posting with Campaign WTK4 information
No. WTK42026-10-02. Service campaign. Technical Information for Campaign WTK4 – Reset Vehicle Electrical System Battery
No. 103-25-22026-10-02. Service bulletin. Technical Information for Need to Replace Components of the High-Voltage Battery - High-Voltage Battery Control Unit / Cell module; No Mixed Installation Permitted: Observe Specified Approach
No. 86-262026-10-02. Service bulletin. Technical Information for Vehicle Color in Front Display/Control Panel Wrong after Replacing Central Computer (PCM)
No. 84-262026-10-02. Service bulletin. Technical Information for Filler Flap on Vehicles with Hybrid Drive System (PHEV) Does Not Close
No. 81-262026-10-02. Service bulletin. Technical Information for Yellow Warning Message “All-Wheel Drive System Malfunction”, “C12BEF6” and “C133700” in the All-Wheel Electronics Control Unit
No. 12-262026-10-02. Service bulletin. Technical Information for Damage to Nano Plug Contacts Due to Utilization of Incorrect Measuring Equipment