AUDI S4 2006

🚨 What to check before buying

Overall risk score: 10/10

Serious risks

• Carbon buildup: GDI carbon deposits on intake valves.
• Coolant transfer pipe: Internal V coolant pipe can develop leaks.
• Car is 20 years old — expect age-related wear: rubber seals, bushings, water pump, AC compressor
• Very high mileage (257,308 km) — expect suspension, drivetrain, and turbo wear. Thorough pre-purchase inspection essential.

Additional notes

• Vehicle is 15+ years old. Age-related issues: rubber seals/hoses degrade, electrical connectors corrode, suspension bushings wear. Not specific to any engine, but expect €500-1,500/year in age-related maintenance beyond normal service items.
• Any car with 200k+ km requires extra scrutiny. At this mileage: suspension components are worn (bushings, ball joints, shocks), seals and gaskets are hardened, electrical connectors corrode, and major components approach end-of-life. For luxury cars (BMW, Mercedes, Audi) the cost of 200k+ km maintenance can exceed the car's value. Always get a pre-purchase inspection (PPI) and budget 15-25% of purchase price for immediate maintenance.
• S8 petrol (106 listings, avg 170k km, €40k) — 4.0 TFSI V8 biturbo with cylinder deactivation. At high mileage: turbo wastegate actuators (€2000+ pair), carbon buildup on intake valves, adaptive air suspension (standard on S8, €2500+/corner). Fuel consumption 15-18L/100km city.
• Vehicle is 15+ years old. Age-related issues: rubber seals/hoses degrade, electrical connectors corrode, suspension bushings wear. Not specific to any engine, but expect €500-1,500/year in age-related maintenance beyond normal service items.