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.
2013 Audi S8FACTORY OEM SERVICE PROCEDURE
Heating, Ventilation & Air Conditioning (Coolant Circuit - Additional Components For Control And Regulation)
- 87 A/C System
- Actuators
- Rear Recirculation Door Motor -V421-, REMOVING AND INSTALLING
- Rear Air Quantity Motor -V443-, REMOVING AND INSTALLING
- Adjustment Motor Bracket, Removing And Installing
- Bracket For Adjustment Motor Left Side And Center Vent Motor -V110- And -V299-, Removing And Installing
- BRACKET FOR Adjustment Motor Left Footwell Door Motor -V108- AND Left Footwell Temperature Door Motor -V411-, REMOVING AND INSTALLING
- BRACKET FOR ADJUSTMENT MOTOR Right Footwell Door Motor -V109- AND Right Footwell Temperature Door Motor -V412-, REMOVING AND INSTALLING
- Front Heater And A/C Unit
- Notes
- Overview - Heater And A/C Unit Attachments And Air Intake Manifold
- Air Distribution Housing Doors And Partitions Assembly Overview
- Overview - Heater And A/C Unit Air Intake Manifold
- Overview - Evaporator Housing
- Evaporator, Removing And Installing
- Evaporator, Cleaning
- Auxiliary Heater Heating Element -Z35-, CHECKING
- Auxiliary Heater Heating Element -Z35-, REMOVING AND INSTALLING
- A/C System Temperature Door Heat Output Activation, Checking
- Heater And A/C Unit, Removing And Installing
- Front A/C Unit Air Intake Housing, Removing And Installing
- Dust And Pollen Filter, Removing And Installing
- Fresh Air Blower -V2-, REMOVING AND INSTALLING
- Heater Core, Removing And Installing
- Condensation Water Drain, Removing And Installing
- Condensation Water Drain, Checking
- Rear Heater And A/C Unit
- Notes
- Overview - Heater And A/C Unit Attachments And Air Intake Manifold
- Air Distribution Housing Doors And Partitions Assembly Overview
- Evaporator, Removing And Installing
- Heater And A/C Unit, Removing And Installing
- Heater And A/C Unit Air Intake Manifold, Removing And Installing
- Rear Fresh Air Blower -V80-, REMOVING AND INSTALLING
- Rear Fresh Air Blower Control Module -J391-, REMOVING AND INSTALLING
- Heater Core, Removing And Installing
- Rear Intake Air Temperature Sensor -G639-, REMOVING AND INSTALLING
- Condensation Drain Hose, Checking
- Air Guide
- Notes
- Overview - Air Routing And Air Distribution In Passenger Compartment
- Air Intake And Outlet Openings
- Driver Side FOOTWELL Vent, Removing And Installing
- Front Passenger Side FOOTWELL Vent, Removing And Installing
- Rear FOOTWELL Vent, Removing And Installing
- Air Distribution Channels, Removing And Installing
- Passenger Compartment Forced Air Ventilation, Removing And Installing
- Fresh Air Intake, Removing And Installing
- Plenum Chamber Water Drain, Checking
- Plenum Chamber Water Drain, Cleaning
- Coolant Circuit
- Incorporation Of A/C System Into Coolant Circuit
- Information On Incorporation Of A/C System Into Coolant Circuit
- Incorporation Of Front A/C System Into Coolant Circuit, Vehicles Without A Parking Heater
- Incorporation Of Front A/C System Into Coolant Circuit, Vehicles With A Parking Heater
- Incorporation Of Rear A/C Unit Into Refrigerant And Coolant Circuit
- Coolant Recirculation Pump -V50-, REMOVING AND INSTALLING
- Coolant Shut-Off Valve -N82-, REMOVING AND INSTALLING
- Heater Coolant Shut-Off Valve -N279-, REMOVING AND INSTALLING
- Shut-Off Valve Bracket, Removing And Installing
- Coolant Circuit, Bleeding
- Incorporation Of A/C System Into Coolant Circuit
- Display And Control Head
- Additional Components For Control And Regulation
- Windshield Defogger Control Module -J505-, REMOVING AND INSTALLING
- Sunlight Photo Sensor -G107-, REMOVING AND INSTALLING
- FUNCTION OF Air Quality Sensor -G238-
- Air Quality Sensor -G238-, REMOVING AND INSTALLING
- Outside Air Temperature Sensor -G17-, REMOVING AND INSTALLING
- Air Ionization System Control Module -J897-, REMOVING AND INSTALLING
- Left Vent Temperature Sensor -G150-, REMOVING AND INSTALLING
- Right Vent Temperature Sensor -G151-, REMOVING AND INSTALLING
- Left Footwell Vent Temperature Sensor -G261-, REMOVING AND INSTALLING
- Right Footwell Vent Temperature Sensor -G262-, REMOVING AND INSTALLING
- Evaporator Vent Temperature Sensor -G263-, REMOVING AND INSTALLING
- Left Rear Upper Body Vent Temperature Sensor -G635-, REMOVING AND INSTALLING
- Right Rear Upper Body Vent Temperature Sensor -G636-, REMOVING AND INSTALLING
- Left Rear Footwell Vent Temperature Sensor -G637-, REMOVING AND INSTALLING
- Right Rear Footwell Vent Temperature Sensor -G638-, REMOVING AND INSTALLING
- Actuators
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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