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Service campaign WRN4

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 campaign
NHTSA id11021679
Published by NHTSA2025-08-07
Manufacturer's numberWRN4
Manufacturer's date2025-07-16
Campaign id or software versionWRN4
NHTSA componentPOWER TRAIN

NHTSA's summary

Porsche intranet posting with information on WRN4 Workshop Campaign – Reworking drain hose on heating/fresh-air unit

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

Transmission and driveline

Vehicles listed
PORSCHE TAYCAN2025
PORSCHE TAYCAN TURBO2026 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO GT2025 (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
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
No. D7802026-05-07. Service bulletin. Parts information for parts withdrawal involving the transmission oil. Part number 00004321012 is affected - the vehicles that use this part number should be included.
No. D7762026-05-06. Service bulletin. Parts information for parts withdrawal involving the transmission oil. The vehicles affected are ones that use the part number 00004330563
No. D768.12026-04-07. Service bulletin. Parts information for parts withdrawal involving the transmission fluid. Part number 00004321048. The cars affected are ones that use the part number listed.
No. D7682026-03-02. Service bulletin. Parts information for parts withdrawal involving the (00004321048) Transmission fluid. The vehicles affected are ones that use the part number mentioned.
No. D7612026-03-02. Service bulletin. Parts information for parts withdrawal involving the 7 speed dual clutch gear box. Part numbers 0BG300047 and 0BG300047X are affected. Cars that are involved are ones that use the part numbers mentioned.
No. WSQ82026-01-06. Service campaign. Technical information for workshop campaign WSQ8 – Replacing Disc Wheels On Front Axle
No.60-252025-12-05. Service bulletin. Symptom-based workshop manual for "Tweeting" From the Rear End Area for Light-Duty Driving Between 60 - 80 km/h (37 - 49 mph) and From Approx. 100 km/h (62 mph): Replace Equipotential Bonding Line (Rear Power Electronics) On Rear Axle
No. D735.12025-10-08. Service bulletin. Parts information for parts withdrawal involving the rear axle steering. The part numbers are 992501031H, 992501032H, 992501033AB, 992501033AC. The vehicles affected are cars that use the part numbers listed