Overview
Community orientation
The Audi A6 C5 (1997–2004) spans the 1.8T four-cylinder, the 2.4/2.8/3.0 V6 30v petrols, the 2.7T biturbo V6, the 4.2 V8 quattro, and the 1.9 TDI and V6 TDI diesels, as sedan and Avant, front- or quattro all-wheel drive. Its 2.7T biturbo patterns are authored on this generation and resolve, through the shared engine graph, onto every later Audi that uses that engine. This is an editorial catalogue summary, not a reliability rating; the per-configuration community-orientation patterns are below, each with the build window it applies to.
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Filtered: 18T · 1.8T 20v petrol (EA113).
Known issues
Sorted by severity. Tap an issue to reveal the relevant details and what to check.
Engines & reliability
Tap a row to filter the issues to that engine.
Pre-purchase checklist
Diagnostics
- ☐Check the oil level and ask the seller for the top-up interval
- ☐Scan stored DTCs and check live fuel/ignition/boost data before the test drive