Porsche 911 993
Weaknesses, engine ratings and buying advice
450 PS
3.6L Boxer Biturbo Turbo S Benzin
183 units — the pinnacle of air cooling
Legendary!430 PS
3.6L Boxer Biturbo GT2 Benzin
5 weaknesses
Stay Away!Body Variants
The Porsche 911 993 is available as Coupé and Cabrio — choose your body type for specific insurance data:
Generations
Engine Overview
The Porsche 911 993 is available with 12 engine variants — from 272 to 450 hp. 2 variants had engine changes — the model year is crucial.
The Porsche Carrera (Benziner, 272–285 PS) comes with 2 different engines: M64/05 (1994–1995, Be Careful) und M64/21 (1996–1998, Be Careful). Pay attention to the model year for the Carrera!
The Porsche Carrera 4 (Benziner, 272 PS) has the M64/05 (3.6L Boxer) — rated: "Be Careful", 8 known weaknesses.
The Porsche Carrera 4S (Benziner, 285 PS) has the M64/21 (3.6L Boxer VarioRam) — rated: "Be Careful", 8 known weaknesses.
The Porsche Carrera Cabrio (Benziner, 272–285 PS) comes with 2 different engines: M64/05 (1994–1995, Be Careful) und M64/21 (1996–1998, Be Careful). Pay attention to the model year for the Carrera Cabrio!
The Porsche Carrera Cabrio Tiptronic (Benziner, 272 PS) has the M64/05 (3.6L Boxer) — rated: "Be Careful", 8 known weaknesses.
The Porsche Carrera Cabrio Tiptronic S (Benziner, 285 PS) has the M64/22 (3.6L Boxer VarioRam Tiptronic) — rated: "Be Careful", 10 known weaknesses.
The Porsche Carrera RS 3.8 (Benziner, 300 PS) has the M64/20 (3.8L Boxer VarioRam) — rated: "Be Careful", 10 known weaknesses.
The Porsche Carrera Tiptronic (Benziner, 272 PS) has the M64/05 (3.6L Boxer) — rated: "Be Careful", 8 known weaknesses.
The Porsche Carrera Tiptronic S (Benziner, 285 PS) has the M64/22 (3.6L Boxer VarioRam Tiptronic) — rated: "Be Careful", 10 known weaknesses.
The Porsche GT2 (Benziner, 430 PS) has the M64/60R (3.6L Boxer Biturbo GT2) — rated: "Stay Away!", 5 known weaknesses.
The Porsche Turbo (Benziner, 408 PS) has the M64/60 (3.6L Boxer Biturbo) — rated: "Be Careful", 6 known weaknesses.
The Porsche Turbo S (Benziner, 450 PS) has the M64/60S (3.6L Boxer Biturbo Turbo S) — rated: "Be Careful", 5 known weaknesses.
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rust window frame Windscreen and rear window frames are prone to rust, especially if windows were replaced incorrectly. Moisture ingress and adhesive residue accelerate the attack. Symptoms: Visible rust bubbles at the window edge, water ingress inside the cabin, rubber seal peeling off. | High | |
| Rust rear bumper support Hollow sections of the rear bumper supports rust from the inside due to dirt accumulation. Regular cleaning and cavity preservation are essential. Symptoms: Visible rust bubbles under the rear bumper trim, rotted hollow support tips visible during underside inspection. | Medium |
Top Reported Issues
Alternatives
Known Problems and Issues
A total of 87 weaknesses have been documented for the Porsche 911 993 (1993–1998) — 73 engine-related and 14 vehicle-related. One problem engine: M64/60R (3.6L Boxer Biturbo GT2). Typical issues affect Rust, Electronics, HVAC, Suspension.
911 (M64.50, 1993–1994) — Be Careful: Turbo bearings worn (cooldown required), Turbo bearing wear (KKK K27), K27 turbocharger bearing wear. Power: 360 PS.
911 (M64/05, 1994–1995) — Be Careful: Engine bay wiring harness — insulation brittle (recall), Valve cover gasket porous, Chain case gasket leaking. Power: 272 PS.
911 (M64/20, 1995–1996) — Be Careful: Engine bay wiring harness — insulation brittle (recall), Oil starvation under high-load track driving, Valve guides worn (oil consumption, blue smoke). Power: 300 PS.
911 (M64/60, 1995–1998) — Be Careful: Turbocharger bearings worn (both units), Engine bay wiring harness — insulation brittle (recall), Boost control hose faulty. Power: 408 PS.
911 (M64/60R, 1995–1997) — Stay Away!: Turbocharger bearings worn (both units), Valve cover gasket porous (oil loss), DME relay heat death — engine won't start. Power: 430 PS.
911 (M64/21, 1996–1998) — Be Careful: Engine bay wiring harness — insulation brittle (recall), Valve cover gasket porous, Chain case gasket leaking. Power: 285 PS.
911 (M64/22, 1996–1998) — Be Careful: Engine bay wiring harness — insulation brittle (recall), Valve cover gasket porous (oil loss), Chain case gasket leaking. Power: 285 PS.
911 (M96.01, 1997–2001) — Be Careful: IMS bearing single-row: engine failure risk, Bore scoring: cylinder bore wear, Cylinder head crack: oil in coolant. Power: 300 PS.
911 (M64/60S, 1997–1998) — Be Careful: Turbocharger bearings worn (both units), Valve cover gasket porous (oil loss), DME relay heat death — engine won't start. Power: 450 PS.
What to watch out for with the Porsche 911? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
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Last updated: February 2026 · All information without guarantee