Porsche GT2
The M96.70 is the Mezger turbo — technically related to the GT3/GT1 engines, but built for forced induction, and therefore the exact opposite of the IMS-plagued naturally aspirated engine: robust, resilient, no IMS bearing problem. The 996 Turbo sounds more subdued than expected — experts describe it as "restrained", almost muted compared to a naturally aspirated engine, but the turbo thrust is immense and available early. 309 kW without turbo lag, with twin-turbo delivery that's pleasantly linear. Reliability: described as "virtually indestructible". The 996 GT2 at 355 kW is the brutal escalation — more boost, no AWD, higher demands. Anyone with IMS anxiety who still wants a 996 goes for the Turbo or GT3: both are Mezger, both are stress-free.
355 kW, no all-wheel drive — experts only
The 996 GT2 is the most brutal Mezger derivative without a safety net: 355 kW over the rear wheels, no all-wheel drive, high driver demands. "Not for the faint of heart" — those who master it experience the most intense 996 driving experience. As a collector's piece equally coveted as the GT3 variants, as a driver's car considerably more demanding. Mezger guarantees reliability when treated correctly.
Engine Weaknesses 5
Plastic coolant lines become brittle with age. Particularly the bonded aluminium flange behind the alternator. Coolant loss under pressure can cause overheating.
Symptoms: Coolant loss without visible puddle, coolant warning light, white steam from the rear.
Water pump with plastic impeller can fail at around 110,000 km. Sudden coolant loss with overheating risk. Metal impeller recommended as an upgrade.
Symptoms: Grinding noises from the engine bay, sudden coolant drop, white smoke cloud.
Wastegate springs fatigue over time. Flaps open too early, boost pressure drops in the upper rpm range. Both sides often affected simultaneously.
Symptoms: Noticeable power loss above 4,000 rpm, lower than normal boost pressure, sluggish throttle response.
Hydraulic engine mounts lose their damping fluid over time and collapse. The engine rocks on load changes. Particularly common above 150,000 km.
Symptoms: Dull clunk on take-off, vibrations at idle, play in the drivetrain
Exhaust manifolds crack at weld seams due to thermal cycling. Because the catalytic converter is integrated in the mid-engine layout, replacement often requires a new cat as well.
Symptoms: Ticking noise on a warm engine, exhaust fumes in the cabin, black soot marks
Vehicle Weaknesses 6
Brake lines on the driver's side under the plastic cover at the sill rust through completely. Salt water is trapped — safety-critical.
AC refrigerant lines corrode with age and moisture. Refrigerant loss leads to AC failure. Particularly common on cars kept in humid environments.
The steering rack develops leaks at the shaft seals and high-pressure lines. The power steering reservoir slowly empties.
The PCM navigation system draws too much current when the car is parked. The battery discharges within days if the car stands for longer.
Rubber bushings in the front control arms wear and cause imprecise steering. Significantly earlier wear under sporty use.
Electric window regulators wear out with age. Motor or mechanism fails, window can no longer close fully.
Reports & Tests
26 owner complaints filed with NHTSA (1997–2005). Most reported: Engine (7), Engine & Cooling (6), Airbags (4).