Overview
Community orientation
The Audi A4 B9 (2015–2023) spans the 2.0 TFSI (EA888) petrol four, the S4's 3.0 TFSI V6, the 2.0 TDI (EA189/EA288) diesel four, and the 3.0 TDI V6 quattro, as sedan and Avant, front- or quattro all-wheel drive. B9 authors no problems of its own: each engine's community-orientation patterns are modelled on the corpus that owns that engine and resolve, through the shared engine graph, onto B9's applications. This is an editorial catalogue summary, not a reliability rating; the per-configuration patterns come from the owning engines, each with the build window it applies to.
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Filtered: 20TDI · 2.0 TDI diesel (EA189/EA288).
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
Cold start
- ☐Start the engine from cold and listen for rattling or ticking from the timing chain area
Diagnostics
- ☐Scan stored DTCs and check live fuel/ignition/boost data before the test drive