Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Audi S8FACTORY OEM SERVICE PROCEDURE
Fuel Supply
- 20 Fuel Supply
- Fuel Tank
- Overview - Fuel Tank
- Fuel Tank, Draining
- Fuel Tank, Draining, Vehicles With TFSI Engine, Fuel Delivery Unit (Fuel Pump) Not Faulty
- Fuel Tank, Draining, Vehicles With TFSI Engine, Fuel Delivery Unit (Fuel Pump) Faulty
- Fuel Tank, Draining, Vehicles With TDI Engine, Fuel Delivery Unit (Fuel Pump) Not Faulty
- Fuel Tank, Draining, Vehicles With TDI Engine, Fuel Delivery Unit (Fuel Pump) Faulty
- Fuel Tank, Removing And Installing
- Fuel Tank, Removing, TFSI Vehicles Without High-Voltage System
- Fuel Tank, Removing, TDI Vehicles
- Fuel Tank, Installing, All Vehicles Without High-Voltage System
- Fuel Tank, Removing And Installing, Vehicles With High-Voltage System
- Fuel Filler Neck, Removing And Installing, Vehicles With High-Voltage System
- Tank Switch-Off Valve -N288-, REMOVING AND INSTALLING
- Fuel Tank Pressure Sensor -G400-, REMOVING AND INSTALLING
- MISFUELING Guard, Removing And Installing
- MISFUELING Guard, Deactivating
- Fuel Delivery Unit/Fuel Level Sensor
- Connector Couplings
- Fuel Filter
- EVAP System
- Connection Diagram - EVAP System
- Overview - EVAP System
- EVAP Canister, Removing And Installing
- Fuel Tank Leak Detection Module -GX36-, REMOVING AND INSTALLING
- Fuel Tank Leak Detection Control Module -J909-, REMOVING AND INSTALLING
- FUEL SYSTEM, CHECKING FOR LEAKS, VEHICLES WITH Fuel Tank Leak Detection Module -GX36-
- FUEL TANK FUNCTIONALITY - LEAK DETECTION, VEHICLE WITH Fuel Tank Leak Detection Module -GX36-
- EVAP System Functionality, Vehicles With High-Voltage System
- Accelerator Mechanism
- Fuel Pump
- Special Tools
- Fuel Tank
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.