Audi A8 (D4)
The D4 Audi A8 is a remarkably agile flagship luxury saloon, benefiting immensely from its lightweight all-aluminium Audi Space Frame (ASF) construction. It serves as a formidable rival to the Mercedes S-Class and BMW 7 Series, offering discreet styling, Quattro all-wheel drive, and a whisper-quiet cabin. While depreciation makes it a tempting used buy, it carries immense complexity in its air suspension, dense electronics, and densely packaged V8 engines, meaning running costs are stratospheric. It suits discerning luxury buyers who prefer understated elegance and tech-forward interiors, provided they have a healthy maintenance budget.
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Common Faults & Reliability
These are the most common documented problems for the Audi A8 (D4), sorted by their typical impact and frequency.
Air Suspension Failure
high severityAir struts leak and the compressor burns out trying to compensate. This is a common and expensive reality of aging luxury cars.
4.0 TFSI Turbo Strainer Blockage
high severityA tiny oil strainer screen feeding the twin turbos can block with carbon, starving the turbos of oil and causing rapid, catastrophic failure.
3.0 TDI Timing Chain Rattle
high severityThe V6 TDI timing chains sit at the rear of the engine and can stretch, creating cold-start rattle and requiring gearbox removal for repair.
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Example Audi A8 (D4) Vehicles
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