The 2000 Arnage with its 6.75L twin-turbo V8 is a hand-built monument to British luxury, but it's plagued by catastrophic engine failures, transmission cooling issues, and fuel system deterioration that make ownership expensive and unpredictable.
Nikasil Cylinder Liner Failure Leading to Complete Engine Rebuild
Common · high severityTypical onset: 60,000-90,000 mi
Symptoms: Excessive oil consumption (quart every 500-1000 miles), Blue smoke on cold start that persists, Loss of compression in multiple cylinders, Rough idle and misfires that worsen over time, Metallic debris in oil during analysis
Fix: Full engine rebuild required - Nikasil cylinder liners corrode from sulfur in fuel, scoring bores beyond repair. Requires pulling engine, re-sleeving all cylinders with steel or Alusil liners, new pistons, rings, bearings, gaskets. 80-120 hours labor. Many shops won't touch it - requires specialist.
Estimated cost: $25,000-45,000
Transmission Oil Cooler and Line Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: Transmission fluid leaking onto subframe or ground, Transmission overheating warnings or limp mode, Harsh shifting or slipping after highway driving, Pink residue under vehicle
Fix: ZF 4HP24 transmission cooler lines crack at fittings, cooler itself corrodes internally. Requires replacing cooler, all hard and flex lines, often transmission mounts while access is available. 8-12 hours labor. Failure to address causes transmission damage.
Estimated cost: $2,800-4,500
Fuel System Hose and Pump Deterioration
Common · high severityTypical onset: Any mileage on aged vehicles
Symptoms: Strong fuel smell in cabin or garage, Fuel weeping visible on hoses near engine bay, Hard starting or extended cranking when hot, Stalling at idle or low speed, Check engine light with fuel pressure codes
Fix: Rubber fuel lines become brittle and crack (recall-related), in-tank pump fails from ethanol exposure. Requires replacing all rubber fuel lines, fuel filter, and often both in-tank and chassis-mounted pumps. Tank drop required. 10-14 hours labor.
Estimated cost: $3,200-5,500
Turbocharger Wastegate and Actuator Seizure
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Loss of power at higher RPMs, Overboost codes and limp mode activation, Rattling or chattering from engine bay under load, Uneven boost delivery between banks
Fix: Wastegate rods seize from carbon buildup and corrosion, actuators fail. Twin turbos mean both should be serviced simultaneously. Can sometimes be freed and cleaned, but usually requires turbo removal and rebuild or replacement. 12-16 hours labor for both sides.
Estimated cost: $4,500-8,000
Hydraulic Brake Line Corrosion
Occasional · high severitySymptoms: Soft or spongy brake pedal that doesn't improve with bleeding, Brake fluid leaks at line connections or mid-line, Corrosion visible on steel brake lines under vehicle, Brake warning light intermittently
Fix: Steel brake lines corrode from road salt and age (recall-related). Requires replacing affected hard lines - often need custom fabrication or expensive OEM sections. While addressing, smart to do all rubber flex hoses. 6-10 hours labor depending on how many lines need replacement.
Estimated cost: $1,800-3,500
Air Suspension Compressor and Valve Block Failure
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Vehicle sits low on one or more corners, Suspension compressor runs constantly, Harsh ride quality or excessive body roll, Warning message about suspension fault, Hissing sound when parked
Fix: Compressor wears out, valve block diaphragms leak, air springs crack. Compressor alone is 4-6 hours, valve block another 3-4 hours. Air springs are 2-3 hours each. Diagnose carefully - could be multiple components. Many owners convert to coils to escape ongoing costs.
Estimated cost: $2,500-6,000
Electrical Gremlins from Corroded Body Control Module
Occasional · low severitySymptoms: Intermittent no-start conditions, Random warning lights that come and go, Windows, locks, or seats operating erratically, Battery drain when parked, Climate control behaving oddly
Fix: Body control module and related modules suffer water intrusion and corrosion. Located in various spots - some under carpets. Requires diagnosis with Bentley-specific scan tools, module replacement, and possibly re-coding. 3-8 hours depending on which module and access. Used modules often have same issues.
Estimated cost: $1,500-4,000
Only buy if you've found a steel-sleeved engine example, have a Bentley specialist within 50 miles, and can afford to set aside $30k for the inevitable catastrophe - otherwise this is a financial black hole masquerading as a luxury car.
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.