2014 Audi S8 Service and Repair Manual

This 2014 Audi S8 factory service and repair manual is built around the 4.0L V8 (engine code CGTA) and Base sedan trim on your build sheet, so the torque values, fluid capacities, and diagnostic trees inside match what Audi published for this specific configuration rather than a generic A8-platform approximation.

Engines covered

• 4.0L V8 (243 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 2014 S8. Five recalls are on federal record for this model year. Two cover the high-pressure fuel pump supply line, which can turn porous over time and leak fuel near an ignition source, raising fire risk. A third covers a hood-area seal that can come loose and contact hot engine components, also a fire concern. A fourth covers the standard sunroof glass panel, which on certain production-date vehicles may shatter, risking injury from falling glass or driver distraction. A fifth covers the turbocharger oil supply strainer, which can become blocked and starve the turbo bearings, leading to wear, an engine stall, and increased crash risk. Owners have filed 6 complaints for the year. The factory diagnostic and repair procedures behind each of those systems are here.

From tracing a fuel-line leak to inspecting the turbocharger oil supply or servicing the sunroof mechanism, it keeps you on the OEM procedure and the correct specification for your specific 2014 S8.