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Service bulletin 401

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 id624977
Published by NHTSA2001-11-16
Manufacturer's number401
Manufacturer's date2001-04-06
NHTSA componentEXTERIOR LIGHTING:HEADLIGHTS

NHTSA's summary

MOISTURE ACCUMULATION INSIDE THE HEADLIGHT ASSEMBLY. *YH

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

Lighting, Headlights

Vehicles listed
PORSCHE 911 CARRERA1999 (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
5992003-03-03. Service bulletin. PORSCHE LITRONIC HEADLIGHT RETROFIT KIT. *TT