2012 ASTON MARTIN VANTAGE

Typical onset: 40,000-80,000 mi

Symptoms: Metallic knocking or ticking from bottom end, especially cold start, Low oil pressure at idle when fully warmed up, Metal flakes or glitter visible in oil during changes, Check engine light with knock sensor codes

Fix: This is the big one. The 4.7L V8 has a documented tendency for premature bearing wear due to marginal oiling design and tight tolerances. Fix requires engine-out rebuild with upgraded bearings, new pistons/rings if cylinder walls are scored, and crankshaft inspection/polishing. Budget 40-60 hours labor plus machine work. Many owners upgrade to aftermarket bearing solutions during rebuild.

Estimated cost: $15,000-25,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid appearing milky or pink-tinged (coolant intrusion), Engine coolant level dropping with no external leaks, Harsh or erratic shifts, especially when cold, Overheating transmission temps on gauge if equipped

Fix: The internal transmission oil cooler fails and allows coolant into the trans or vice versa. Requires immediate attention or you'll destroy the transmission. Replace cooler, flush both systems multiple times, and pray the trans survived. If cross-contamination sat for any time, transmission rebuild is often required. 8-12 hours for cooler and flushes, add 30-40 hours if trans needs rebuilding.

Estimated cost: $2,800-4,500 (cooler only), $8,000-14,000 (if trans damaged)

Typical onset: 35,000-70,000 mi

Symptoms: Heavy clunk on takeoff or during aggressive downshifts, Vibration through center tunnel at idle in gear, Grinding or scraping noises from transmission tunnel area, Visible sagging or cracking of rubber mount material

Fix: The rear-mounted transaxle uses mounts that fail prematurely, especially with spirited driving. Aston parts are horrifically expensive. Replacement requires lifting powertrain slightly and working in tight quarters. 4-6 hours labor.

Estimated cost: $1,800-3,200

Typical onset: 60,000-100,000 mi

Symptoms: White smoke from exhaust on cold start that persists, Coolant consumption with no visible external leaks, Bubbling in coolant reservoir when revving engine, Rough idle and misfire codes on one or both banks, Oil cap shows milky residue

Fix: The 4.7L can blow head gaskets, sometimes as a consequence of overheating from oil cooler failure. Requires heads-off service with both gaskets, head resurfacing, timing chain inspection while you're in there, and often cam seal replacement. 25-35 hours labor. Do not half-ass this with one side only.

Estimated cost: $8,000-13,000

Typical onset: Not mileage-driven, maintenance neglect

Symptoms: Hesitation or stumbling under hard acceleration, Lean misfire codes (P0171/P0174), Rough running at high RPM, Car feels like it's running out of breath above 5000 RPM

Fix: Aston recommends fuel filter replacement every 20k miles but many owners skip it. Filter is in-tank on some applications or inline on others depending on market. Can be a pain to access. The pump can fail prematurely if filter is heavily clogged. 2-4 hours depending on configuration.

Estimated cost: $600-1,200

Typical onset: 50,000-90,000 mi

Symptoms: Blue smoke on deceleration or during hard acceleration, Excessive oil consumption (quart every 500-1000 miles), Fouled spark plugs on one or more cylinders, Loss of compression on cylinder leak-down test

Fix: Related to the bearing issue, piston ring land failure or wear can happen prematurely. Often discovered during investigation of oil consumption. Requires engine removal and full tear-down. At this point you're doing a complete rebuild with new pistons, rings, bearings, and machine work. 40-60 hours.

Estimated cost: $16,000-24,000