Audi A6 C5 — Reliability

C5 2003–2004 1 engine

Reliability Summary

Engine 4.2 V8 FSI (BAR/BVJ/BNS/BYH/CAU/CFSA) — 76/100 ACCEPTABLE
Known Issues 2

Engine in this model

ACCEPTABLE 76

4.2 V8 FSI (BAR/BVJ/BNS/BYH/CAU/CFSA)

4.2L NA V8

Direct-injection 4.2 V8 of the RS4 B7, R8, RS5, Q7, A6 C6 and A8 D3. Sweet and high-revving, general...

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Known Issues Across All Engines

Issue Engine Severity Onset
Rear timing-chain guides and tensioners wear (engine-out job) 4.2 V8 FSI (BAR/BVJ/BNS/BYH/CAU/CFSA) high —
Intake-valve carbon build-up and blue smoke (direct injection) 4.2 V8 FSI (BAR/BVJ/BNS/BYH/CAU/CFSA) moderate —