Maserati GranTurismo 4.7 V8 S M145

The F136 V8 uses variable valve timing controlled by camshaft variators. On engines built before approximately September 2011, the variator seals and oil supply passages degrade, allowing oil to drain back when the car is parked. This produces a metallic rattle on cold start that can range from a brief 1-2 second clatter to a sustained 30+ second noise. The issue was largely addressed from 2011 onward under engine changes led by Paolo Martinelli, including DLC-coated camshaft components and improved oil circuit design. Repair requires extensive engine disassembly (specialists report 25-30 hours of labor) to access the variators, chains, tensioners, and guides. Given the labor cost to reach these components, responsible specialists replace all related wear items (chains, guides, tensioners, all variators, hydraulic lifters) at the same time. For post-2011 engines, this risk drops significantly.

Oil leaks from the valve cover gaskets and timing case are among the most common issues on the F136 V8. The gaskets degrade with age and repeated heat cycling, and the V-configuration of the engine means leaks can drip onto exhaust components, creating smoke and smell. Valve cover gasket replacement alone typically runs 6-9 hours of labor at a specialist. If the timing case front seal is also leaking (common on higher-mileage cars), the repair becomes more involved. OEM gaskets cost around €200 for both sides, but the labor is the primary expense. Many owners report first noticing leaks between 60,000-100,000 km.

Several coolant hoses on the GranTurismo are routed in hard-to-reach locations, particularly against the firewall and under the intake manifold. These rubber hoses deteriorate from constant engine heat exposure and can crack or split without warning, causing rapid coolant loss. The hose parts themselves cost very little (under 50 euro), but accessing them requires removing the intake manifold. Some of these hoses are related to the transmission cooler circuit and only flow coolant when the thermostat opens under heavy driving, which means leaks can develop without being noticed during gentle use. Proactive replacement of all engine-bay rubber hoses during a major service is strongly recommended.

The Skyhook adaptive suspension uses electronically controlled dampers that adjust in milliseconds based on road conditions and driving style. These complex units have a limited service life and commonly develop oil leaks or internal valve failures between 60,000 and 100,000 km. OEM replacement shocks cost approximately 1,500-2,000 per pair (front or rear). Some owners choose to convert to conventional high-quality coilovers (such as KW or Formula Dynamics units), which requires adding error code cancellers since the Skyhook ECU will continue sending commands. Additionally, the Skyhook ECU itself can overheat in warm weather (above 30 degrees Celsius) and temporarily deactivate the system. This is a known design limitation rather than a failure.

The alternator on the GranTurismo is positioned in a location that requires removing the intake manifold for access. This turns a straightforward part replacement into a multi-hour job. The alternator itself is shared with the Ferrari 458, with OEM units costing 600-1,000 euro. Total repair cost at a specialist is typically 1,500-2,800 euro depending on whether the shop replaces related drive belts and gaskets during the same access window. Forum reports suggest failure commonly occurs between 50,000 and 80,000 km, though some owners report earlier failures.

Electrical issues are the most frequently reported complaint across all GranTurismo model years. Common problems include: parking sensors failing in cascade (one faulty sensor takes down the entire system), parasitic battery drain requiring a trickle charger for cars not driven regularly, rain-sensing wipers losing automatic function, dashboard warning lights illuminating sporadically, and infotainment system freezes on pre-2018 cars. The body control module (BCM) can develop software issues that cause phantom warning lights or excessive battery drain. A BCM reflash sometimes resolves drain issues. Individual sensor or module replacements are generally affordable (100-500 euro per item), but the cumulative effect of multiple minor electrical faults is a defining ownership characteristic.

The GranTurismo weighs approximately 1,880 kg, which puts significant stress on suspension bushings and control arms. Front control arm bushings are the most commonly replaced items, with wear typically noticeable as a rumble or knock over bumps. A Maserati dealer quotes around 3,500-5,000 for front control arm replacement (often replacing entire arms rather than just bushings). Independent specialists can press in new bushings for significantly less. Rear bushings also wear but generally last longer. Driving conditions matter significantly: urban driving with poor road surfaces accelerates wear considerably compared to highway use.

Like the Ferrari 458 and other contemporary Italian luxury cars, the GranTurismo used a soft-touch rubberized coating on HVAC controls, window switches, center console buttons, and various trim pieces. This coating degrades over time due to heat exposure, UV light, and humidity, turning into a sticky, unpleasant surface. Nearly all cars older than 8-10 years show this to some degree. DIY removal with isopropyl alcohol works on flat surfaces but risks damaging button markings. Professional refinishing (stripping and repainting with durable finish) costs 500-1,500 for the main controls. Aftermarket digital climate control panel replacements that eliminate the problem entirely are now available and are plug-and-play.