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Service bulletin 304

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 id10008056
Published by NHTSA2004-07-21
Manufacturer's number304
Manufacturer's date2004-06-25
NHTSA componentWHEELS:LUGS/NUTS/BOLTS/STUDS

NHTSA's summary

WHEEL FASTENING BOLTS HAVE BEEN MODIFIED. *MJ

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Wheels, Wheel nuts and studs

Vehicles listed
PORSCHE 911 GT22004 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO2004 (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
3042004-07-21. Service bulletin. WHEEL FASTENING BOLTS HAVE BEEN MODIFIED. PORSCHE 911 GT3 2004. *MJ