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Service bulletin 9904

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 id604430
Published by NHTSA1999-04-29
Manufacturer's number9904
Manufacturer's date1999-02-08
NHTSA componentELECTRICAL SYSTEM:IGNITION:MODULE

NHTSA's summary

INFORMATION REGARDING ELECTRONIC CONTROL MODULE (ECM) CODING. *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

Electrical system, Ignition

Vehicles listed
VOLKSWAGEN BEETLE1999

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
TT6414022023-07-31. Service bulletin. To detect which line(s) is inoperative, utilize a volt meter to check for 0 V, which will be present after the open in the grid line. The check must be performed with the engine running and heated rear window switched on. Switch OFF the ignition and visually locate the damage. Proceed with checking any other lines as necessary. Once the damaged line is identified, repair utilizing the Repair kit by Permatex® ITEM 09117.