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Service bulletin No. 05-26-1

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 id11029198
Published by NHTSA2026-03-02
Manufacturer's numberNo. 05-26-1
Manufacturer's date2026-02-26
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Symptom based workshop manual for Various Noise Complaints on Loudspeakers - Rattling/Clattering/Whirring: Observe Procedure Before Replacing Loudspeakers

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 718 BOXSTER2020, 2021, 2022, 2023
PORSCHE 718 BOXSTER2025
PORSCHE 718 BOXSTER2026
PORSCHE 718 CAYMAN2020, 2021
PORSCHE 718 CAYMAN2023
PORSCHE 718 CAYMAN2026
PORSCHE 9112020, 2021, 2022, 2023, 2024, 2025, 2026
PORSCHE CAYENNE2020, 2021, 2022, 2023, 2024, 2025, 2026
PORSCHE MACAN2020, 2021, 2022, 2023, 2024, 2025, 2026
PORSCHE PANAMERA2020, 2021, 2022, 2023, 2024, 2025, 2026
PORSCHE redundant CAYMAN2022

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

Recalls for the same vehicles and component
23V8410002023-12-13. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:CABLE/CORD:ONBOARD
23V8130002023-12-04. ELECTRICAL SYSTEM
23V0330002023-01-27. ELECTRICAL SYSTEM
19V7350002019-10-16. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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
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. 93-262026-10-02. Service bulletin. Symptom-based workshop manual for False Warning from Lane Change Assist (LCA) - Warning Light in Exterior Mirror Flashes Without Reason
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. 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. 118-252026-10-02. Service bulletin. Technical Information for Rear Lid Opens/Does Not Close - Replacing Closing Aid Motor for Rear Lid
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