Porsche 911 991 — Reliability

991 2012–2016 1 engine

Reliability Summary

Engine 9A1/MA1 — 85/100 BEST
Known Issues 1

Engine in this model

BEST 85

9A1/MA1

9A1 DFI Flat-6

Porsche's second-generation water-cooled flat-six with direct injection (9A1/MA1): 997.2 and 991.1 C...

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Known Issues Across All Engines

Issue Engine Severity Onset
Bore scoring and piston seizure (rare) 9A1/MA1 critical —