Service bulletins for the 2004 Audi A4
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.
172 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Cooling system are shown. Show all
| Edition92 | 2023-02-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Idenifying and mixing factory fill engine coolants |
|---|---|
| 0503 | 2005-05-19. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. COOLANT LEAK OR ON HEAT IN PASSENGER COMPARTMENT. *EH |
| 0406 | 2005-02-03. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. COOLANT LEAK AT OIL COOLER HOSES. *TT |
| 0411 | 2005-01-27. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. UPDATE PROGRAMMING ENGINE CONTROL MODULE FLASHING TO CORRECT EVAP PURGE VALVE DTC P0441 IN THE AUDI 2004 CABRIOLET . *TC |
| 0401 | 2004-10-19. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. MAP CONTROLLED ENGINE COOLING THERMOSTAT, SERVICING. AUDI A4 2002-2005 AND AUDI CABRIOLET 2003-2005. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.