# Service bulletin A9912

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.

- Type: Service bulletin
- NHTSA id: 608341
- Published by NHTSA: 1999\-11\-23
- Manufacturer's number: A9912
- Manufacturer's date: 1999\-06\-18
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

## NHTSA's summary

SUBJECT ON VEHICLE'S EXHIBITING CARBON BUILD\-UP ON THE TOP OF PISTONS, IN COMBUSTION CHAMBERS AND ON INTAKE VALVES. MJS

## 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, Exhaust and emissions, Exhaust manifold, pipes and muffler

## Vehicles listed

- AUDI AUDI

JSON: [/v1/bulletins/608341](/v1/bulletins/608341)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20A9912&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F608341&vehicle=Service%20bulletin%20A9912)