Porsche 911 993 — Reliability

993 1995–1998 1 engine

Reliability Summary

Engine M64 (993: M64/05, M64/06, M64/21; Turbo M64/60) — 81/100 BUY
Known Issues 3

Engine in this model

BUY 81

M64 (993: M64/05, M64/06, M64/21; Turbo M64/60)

M64 3.6 air-cooled Flat-6 (993)

The 3.6 air-cooled flat-six of the Porsche 993 (1993-1998), the last air-cooled 911: Carrera 272 hp,...

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Known Issues Across All Engines

Issue Engine Severity Onset
Valve-guide wear and clogged secondary-air ports (non-Turbo 993) M64 (993: M64/05, M64/06, M64/21; Turbo M64/60) high —
Twin-distributor drive belt failure M64 (993: M64/05, M64/06, M64/21; Turbo M64/60) moderate —
Oil leaks (case through-bolts, valve covers, rear main seal, chain housings) M64 (993: M64/05, M64/06, M64/21; Turbo M64/60) minor —