Audi A4 B9 — Reliability

B9 2018–2023 1 engine

Reliability Summary

Engine EA839 2.9 V6 TT — 75/100 ACCEPTABLE
Known Issues 1

Engine in this model

ACCEPTABLE 75

EA839 2.9 V6 TT

2.9 V6 Biturbo RS4/RS5 (DEZA)

RS4/RS5 B9. EA839 family (shared with Porsche). Hot-V design. Strong internals. Carbon buildup (DI)....

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Known Issues Across All Engines

Issue Engine Severity Onset
Carbon buildup (DI) EA839 2.9 V6 TT moderate 60,000 km – 120,000 km