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Service bulletin 402

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 id10000042
Published by NHTSA2003-02-10
Manufacturer's number402
Manufacturer's date2002-12-13
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

COMPLAINTS ABOUT THE DUAL MASS FLYWHEEL DUE TO TRANSMISSION NOISES (RATTLING, KNOCKING NOISE). *TT

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

Engine

Vehicles listed
PORSCHE BOXSTER1997

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
No. 19-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
No. 18-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
No. 17-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
No. 16-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
No. 14-232023-08-04. Service bulletin. Manufacturers certificate for allocation of approved engine oils
No. 02-23-12023-04-06. Service bulletin. Manufacturers certificate for approved engine C20 engine oils.
No. 05-232023-03-04. Service bulletin. Overview of approved engine A40 oils for all Porsche models that use A40 oil.
No. 04-232023-03-04. Service bulletin. Overview of approved engine C40 oils for all Porsche models that use C40 oil.
No. 03-232023-03-04. Service bulletin. Overview of approved engine C30 oils for all Porsche models that use C30 oil.
No. 33-222022-08-05. Service bulletin. Overview of approved engine C20 engine oils for all Porsche models using this oil.