This is the service and repair manual for the 2026 Audi A8 quattro, covering the standard-wheelbase sedan and the long-wheelbase L alongside it. The A8 is among the most module-dense cars Audi builds, and the manual is structured accordingly — network topology and module coding sit next to the mechanical procedures, so an air suspension, comfort-system or driver-assistance fault can be traced through the bus rather than guessed at from the symptom alone. Torque values, capacities, wiring routing and removal sequences are attached to the steps that need them.
Engine
- 3.0L V6 (CZSE) Turbocharged Mild Hybrid EV-Gas (MHEV)
Trims
- Premium Sedan 4-Door
- L Sedan 4-Door
- L Premium Sedan 4-Door
Known issues on the 2026 Audi A8 quattro. One recall is on federal record for this model year: NHTSA campaign 25V900000, covering a software error that can stop the rearview camera image from displaying as intended, which puts the vehicle outside Federal Motor Vehicle Safety Standard 111 for rear visibility. A camera that does not put up an image cuts the driver's view behind the car and raises the risk of a crash while reversing. The remedy is a dealer software update at no charge, carried internally by Audi as recall code 90TV, with owner notification letters mailed on 14 January 2026 — worth confirming by VIN, because it is a coding job rather than a hardware replacement and is easy to assume was already done. No complaints are logged with NHTSA against this model year.
The engine and trim lineup above is carried forward from 2024, the most recent model year confirmed in detail; erWin lists this chassis continuing into 2026, so exact trim naming and output are subject to confirmation against your own build sticker. Everything else in the manual — guided fault-finding, wiring diagrams, component locations, service intervals and specifications — applies to the 2026 A8 as built, and on a car with this much electrical content it is the difference between a diagnosis and a parts-swapping exercise.
