Service bulletins for the 2000 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.
101 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Catalytic converter are shown. Show all
| 0504 | 2005-08-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. THREE WAY CATALYST, CATALYTIC EFFICIENCY DIAGNOSTIC TROUBLE CODES (DTCS) STORED IN DTC MEMORY. *TT |
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| 0502 | 2005-07-29. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. UPDATE PROGRAMMING FOR CATALYTIC CONVERTER SYSTEM (IC). *TT UPDATE. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.