Audi A8 Mk4 (D5)
The D5 Audi A8 is Audi's most technologically advanced flagship to date, featuring a 48V mild-hybrid system as standard and a sleek, dual-touchscreen MMI cabin. It competes directly with the latest S-Class, focusing heavily on autonomous driving aids, supreme ride comfort, and cutting-edge digital integration. It is supremely comfortable but extremely complex; the Belt Starter Generator (BSG) and predictive active suspension are key failure risks that can leave the car stranded. It suits wealthy executives or chauffeur services that require state-of-the-art tech and ultimate long-distance refinement.
Check a specific car?
Got a registration for a A8 Mk4 (D5)? Get an instant MOT and history report.
Common Faults & Reliability
These are the most common documented problems for the Audi A8 Mk4 (D5), sorted by their typical impact and frequency.
48V Belt-Starter Generator (BSG) Failure
high severityThe Continental BSG power transistors overheat and fail, causing the 48V system to shut down and eventually leaving the car stranded.
Dual-Touchscreen MMI Freezes
medium severityBoth the upper and lower MMI screens can freeze, go black, or reboot, affecting navigation, climate and seat controls.
Air Suspension Strut Leaks
high severityThe standard adaptive air suspension develops leaks over time, causing uneven ride height and expensive compressor replacement.
Browse by Production Year
Select a specific year to view detailed registration directory lookup and annual MOT history reports for the Audi A8 Mk4 (D5).
Example Audi A8 Mk4 (D5) Vehicles
Browse real UK-registered Audi A8 Mk4 (D5) vehicles. Select any registration for an instant MOT and history check.