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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 id10001460
Published by NHTSA2003-05-07
Manufacturer's number402
Manufacturer's date2003-02-28
Replaces1100
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

ENGINE OILS APPROVED BY PORSCHE. *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 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
PIWIS2401e2024-02-08. Service bulletin. Information on PIWIS tester update 42.500.005
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. D6472023-09-09. Service bulletin. Parts information on parts withdrawal for the oil pump
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.