1999 ASTON MARTIN DB7

Typical onset: 60,000-90,000 mi

Symptoms: Excessive oil consumption (quart per 500-800 miles), Cold-start smoke that clears up, Loss of compression, Rough idle when warm, Eventually catastrophic scoring and seizure

Fix: Early supercharged AJ16 engines used Nikasil-coated aluminum bores that deteriorate from sulfur in pre-2000s fuel. Requires complete engine rebuild with steel liners or short block replacement. 40-60 hours labor depending on approach. Many shops recommend full rebuild while you're in there (pistons, rings, bearings, head gaskets).

Estimated cost: $12,000-18,000

Typical onset: 70,000-110,000 mi

Symptoms: Whining or grinding noise from front of engine, Sudden loss of boost pressure, Metal shavings in supercharger oil, Check engine light with fuel trim codes

Fix: Eaton M90 supercharger nose bearings wear out or the rubber coupler disintegrates. Requires supercharger removal and rebuild or replacement. Can grenade and send debris into intake if ignored. 12-16 hours labor for removal, rebuild, and reinstall.

Estimated cost: $3,500-5,500

Typical onset: 80,000-120,000 mi

Symptoms: Transmission fluid leaking from front of trans, Harsh shifting or slipping when hot, Excessive transmission movement during acceleration, Clunking on gear changes

Fix: ZF 5HP24 automatic transmission uses a cooler that leaks at connections and rubber mounts that collapse. Cooler replacement is 3-4 hours, mounts are 2-3 hours. Often done together since you're already under there. Fresh fluid and filter recommended at same time.

Estimated cost: $1,200-2,200

Symptoms: Intermittent no-start, usually when hot, Stalling at idle or when coming to stop, Cranks but won't fire, No fault codes stored in some cases

Fix: Classic Jaguar/Aston issue where the crank sensor fails due to heat soak. Located at rear of engine near bellhousing, painful to access. Car becomes a paperweight until replaced. 2-3 hours labor. Always carry a spare in the glovebox.

Estimated cost: $400-700

Typical onset: 70,000-100,000 mi

Symptoms: Hesitation under boost, Stumbling on acceleration, Hard starting after sitting, Fuel pressure drops under load

Fix: In-tank pump weakens and inline filter clogs (filter change interval is 30k but often neglected). Requires fuel tank drop for pump access. Do both together along with new strainer sock. 4-6 hours labor.

Estimated cost: $1,000-1,600

Symptoms: Windows drop but won't raise, Key fob works intermittently, Door locks cycle randomly, Alarm triggers for no reason, HVAC blend motors clicking

Fix: Typical British car electrical issues from corroded connectors and failed modules. Window regulators fail (6-8 hours per door), door lock actuators seize (2-3 hours per door), and HVAC motors fail. These nickel-and-dime you constantly. Dielectric grease on all connectors helps.

Estimated cost: $500-1,200 per incident