Audi A8 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Audi A8 Quattro
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Audi A8 Quattro ProblemsDecreased Power and Fuel Economy from Carbon Buildup
The 2007-2017 Audi A8 with FSI/TFSI, including the W12, is subject to carbon buildup inside the engine causing power loss, check engine light, and a rough idle. In normal vehicles, the engine is cleaned by the gasoline flowing through, however, these cars use direct injection so gasoline is rerouted away from common carbon buildup areas.
The solution is to remove the intake manifold and professionally clean the intake manifold, intake ports on the cylinder head, and the intake valves. This may need to be done in as few as 20,000 miles.
Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.
Audi A8 Quattro QuestionsParking Brake warning light. Pushrod: doyou think it is as simple as brake fluid (1 answer)
Just need brake fluid ? Really hope it's that simple.
Parking Brake Warning Light came on without warning. Stays lit even though parking brake motor appears to be engaging and disengaging brake when activated.
Car stalled and wasn't able to restart the car. Checked the fuse that wasn't it.
Audi A8 Quattro RecallsCoolant Leaks Into Engine Control Module Causing Stall Or Loss Of Power
A coolant valve may leak onto the engine control module and may cause the engine to stall or lose power. Dealers will replace the coolant valve and inspect for coolant that has leaked through the electrical connector of the engine control module free of charge to resolve the concern.
The sunroof glass may not be secured properly to the sunroof frame. Dealers will install additional adhesive between the sunroof glass and frame free of charge to resolve the concern.
Vehicles equipped with a standard sunroof glass panel are being recalled because the glass can break without warning. Dealers will replace the sunroof glass on affected vehicles to correct this concern.