2019 MASERATI GRANTURISMO

Typical onset: 40,000-80,000 mi

Symptoms: metallic knocking at idle that worsens with RPM, low oil pressure warning, metal shavings in oil during changes, sudden catastrophic engine seizure in worst cases

Fix: The F136 V8 has marginal oiling to rod bearings under high-load conditions, especially if oil changes are delayed. Fix requires full engine-out teardown, bearing replacement, crankshaft inspection/polishing, and often new rods or pistons if debris circulated. Engine-out labor alone is 25-30 hours due to tight engine bay. Many opt for short block replacement instead of rebuild to ensure longevity.

Estimated cost: $15,000-28,000

Typical onset: 50,000-90,000 mi

Symptoms: transmission slipping or delayed engagement, burnt transmission fluid smell, limp mode activation, coolant mixing with ATF creating strawberry milkshake fluid

Fix: The internal oil cooler in the ZF transmission corrodes and allows cross-contamination with engine coolant, destroying clutch packs and valve body. Requires transmission removal (12-15 hours), full rebuild with new cooler, clutches, seals, and torque converter. Some shops recommend replacing radiator-mounted external cooler simultaneously as preventive measure. Catching it early before full contamination can save the valve body.

Estimated cost: $8,000-14,000

Typical onset: 60,000-100,000 mi

Symptoms: clunking during acceleration or deceleration, excessive vibration at idle in gear, visible transmission sag on inspection, difficulty shifting smoothly

Fix: The hydraulic transmission mounts wear and collapse, allowing excessive drivetrain movement. Requires transmission support and mount replacement—about 4-6 hours labor. Use OEM mounts only; aftermarket versions fail within 20k miles. Often discovered during other transmission work, so consider replacing proactively if doing cooler or other trans service.

Estimated cost: $1,200-2,000

Typical onset: 70,000-110,000 mi

Symptoms: harsh or erratic shifting, stuck in one gear or limp mode, transmission fault codes (P0750-P0760 range), flaring between shifts

Fix: The ZF solenoid pack develops internal electrical faults or sticking valves. Requires transmission pan drop and valve body partial disassembly—8-10 hours labor. Replace entire solenoid pack, not individual units. Critical to use fresh OEM Maserati ATF and perform thorough flush since metal debris from worn clutches often contributes to solenoid failure. If debris is heavy, full rebuild may be needed anyway.

Estimated cost: $3,500-5,500

Symptoms: hard starting when engine is hot, stumbling or hesitation after hot restarts, rough idle after sitting in hot weather, extended cranking needed after heat soak

Fix: The in-tank fuel pump and filter assembly sits close to exhaust routing and heat-soaks after shutdown in warm climates. Fuel vaporizes in lines causing hard starts. Some improve with fuel filter replacement (3-4 hours due to tank drop requirements), others need fuel pump module and improved heat shielding. Check fuel pressure when hot vs cold—should hold 58 PSI. Adding heat wrap to nearby exhaust helps as preventive measure.

Estimated cost: $1,800-3,200

Typical onset: 80,000-120,000 mi

Symptoms: check engine light with P0010-P0014 codes, rough idle when cold, slight power loss at high RPM, increased fuel consumption

Fix: The VVT solenoids on each bank stick due to carbon buildup or internal coil failure. Relatively easy access on this engine—3-4 hours to replace both banks. Always replace both simultaneously and clean oil passages in cylinder heads. Use OEM solenoids; aftermarket units cause ongoing codes. Ensure oil changes were done with proper 5W-40 synthetic—wrong viscosity accelerates this failure.

Estimated cost: $1,200-1,800