The 2017 Aventador's 6.5L V12 is a hand-built masterpiece, but the ISR (Independent Shifting Rods) single-clutch automated manual transmission is brutally expensive to service and prone to premature wear under aggressive use. Engine internals hold up well if maintained, but catastrophic failures from poor fuel quality or missed oil changes are ruinously expensive.
ISR Transmission Clutch and Actuator Failure
Common · high severityTypical onset: 15,000-30,000 mi
Symptoms: harsh shifts or refusal to shift, grinding/clunking during gear changes, transmission fault warnings, stuck in gear or neutral
Fix: ISR clutch life is highly dependent on driving style—track days and aggressive launches kill it fast. Clutch replacement requires transmission removal, 18-24 hours labor. Actuator solenoids also fail and require similar disassembly. Factory-only parts.
Estimated cost: $8,000-15,000
Engine Bearing and Piston Ring Failure (Fuel Contamination)
Occasional · high severitySymptoms: metal shavings in oil, knocking or ticking from bottom end, excessive oil consumption, loss of compression, catastrophic engine seizure
Fix: Bad fuel or long oil change intervals cause bearing wear and ring failure. Complete engine-out rebuild: 60-80 hours labor. Crankshaft machining, new pistons, bearings, rings, gaskets. This is a $400k+ car's engine—parts alone are astronomical.
Estimated cost: $50,000-80,000
Transmission Oil Cooler Leaks
Common · medium severityTypical onset: 25,000-50,000 mi
Symptoms: transmission fluid puddles under car, overheating transmission warnings, burnt smell during hard driving, low fluid level alerts
Fix: Cooler lines and the cooler itself develop leaks from heat cycling and vibration. Access requires partial undertray removal and sometimes exhaust work. 6-10 hours labor. OEM parts required due to exotic fluid specs.
Estimated cost: $3,500-6,000
Transmission Mount Deterioration
Occasional · medium severityTypical onset: 30,000-60,000 mi
Symptoms: excessive drivetrain clunk on launch, vibration at idle, misalignment of shifter feel, visible cracking in rubber mount
Fix: The ISR transmission's violent shifts destroy mounts faster than conventional automatics. Transmission must be supported and partially lowered for access. 8-12 hours labor with proper tooling.
Estimated cost: $4,000-7,000
Fuel System Contamination and Filter Clogging
Occasional · medium severitySymptoms: rough idle or misfires, fuel pressure faults, hesitation under load, check engine light for fuel trim
Fix: High-pressure direct injection system is intolerant of contaminated fuel. Fuel filter is inside the tank; requires tank drop and 8-10 hours labor. NHTSA recall addressed fuel line issues, but filter service is not covered. Use only top-tier fuel.
Estimated cost: $2,500-4,000
E-Gear/ISR Shift Solenoid Pack Failure
Occasional · high severityTypical onset: 40,000-70,000 mi
Symptoms: intermittent failure to shift, limp mode activation, error codes for solenoid circuit, delayed engagement
Fix: The solenoid pack controls hydraulic clutch actuation. Requires transmission removal for access—20+ hours labor. All solenoids replaced as an assembly due to labor cost. Extremely expensive Band-Aid for an aging transmission design.
Estimated cost: $12,000-18,000
Buy only if you have a $20k/year maintenance fund and access to a Lamborghini-certified tech—this is a supercar with supercar costs, and the ISR transmission is a ticking time bomb under enthusiastic driving.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.