2006 ASTON MARTIN DB9

Typical onset: 40,000-80,000 mi

Symptoms: Metallic knocking or rattling from lower engine, especially cold starts, Low oil pressure warnings appearing intermittently then permanently, Metal shavings visible in oil during changes, Sudden loss of power followed by seizure

Fix: Root cause is usually oil starvation from clogged galleries, failed oil pump, or running low on oil. Requires complete engine-out teardown, new main and rod bearings minimum, often needs crankshaft machining or replacement. If caught late, pistons and cylinder walls are scored—then you're into full rebuild or short block replacement territory. Expect 60-80 labor hours for engine removal, teardown, machine work coordination, and reinstallation.

Estimated cost: $18,000-35,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid leaking near front of engine bay or underneath, Harsh or delayed shifting when transmission is hot, Transmission temperature warning light illuminated, Burnt transmission fluid smell

Fix: The ZF 6-speed auto relies on external cooler lines that corrode and rupture, or the cooler itself clogs and fails. Running hot for even short periods destroys clutch packs. Requires replacing cooler, all lines, flushing system, and refilling with expensive ZF-spec fluid. If driven overheated, you're looking at full transmission rebuild or replacement. Cooler job alone is 4-6 hours; rebuild adds 20-25 hours.

Estimated cost: $1,800-3,500 for cooler/lines; $8,000-14,000 for rebuild

Typical onset: 60,000-100,000 mi

Symptoms: Coolant puddles under car after parking, Overheating warning on dash, Visible cracks in plastic expansion tank, Steam from engine bay, Sweet coolant smell in cabin

Fix: The plastic expansion tank becomes brittle and cracks; multiple coolant hoses also age poorly and burst without warning. V12 runs hot and overheating even once can warp heads or blow head gaskets—leading to those catastrophic engine rebuilds. Prevention requires replacing tank and all major hoses proactively around 60k miles. Tank and hoses are 3-5 hours labor; head gasket job is 35-45 hours with engine out.

Estimated cost: $800-1,500 preventive; $12,000-20,000 if head gaskets blown

Typical onset: 70,000-110,000 mi

Symptoms: Hard starting after sitting, especially in heat, Loss of power under acceleration above 4,000 RPM, Sputtering or misfiring under load, Check engine light with lean fuel codes

Fix: In-tank fuel pumps fail and inline filters clog from sediment. V12 is sensitive to fuel starvation and will run lean, causing misfires and potential catalyst damage. Filter should be changed every 30k miles but is often overlooked. Pump replacement requires dropping the tank—tight fit in this chassis. Allow 5-7 hours for pump, 2-3 hours for filter.

Estimated cost: $1,200-2,200 for pump; $400-700 for filter

Typical onset: 50,000-90,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration through chassis at idle or under acceleration, Visible sagging of transmission when inspected on lift, Shifter feels loose or notchy

Fix: Hydraulic transmission mounts fail from age and stress. When collapsed, drivetrain movement causes harsh engagement and accelerated wear on driveshaft and differential. Requires lifting transmission slightly to swap mounts—not difficult but labor-intensive in this tight engine bay. Budget 4-6 hours for both mounts.

Estimated cost: $1,200-1,800

Symptoms: Intermittent no-start or slow cranking, Warning lights flickering on dash, Infotainment system resetting randomly, Windows or seats operating sluggishly, Battery constantly dying despite new battery

Fix: Battery is mounted in trunk with long cable runs to engine bay. Corrosion builds at both ends, causing voltage drops and parasitic draw issues. NHTSA recall addressed some cable failures but problem persists. Requires cleaning all connections, replacing corroded cables, and sometimes tracing down phantom draws with amp meter. Can take 2-4 hours of diagnostic plus parts.

Estimated cost: $300-800