2011 Audi A8 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2011 Audi A8 Quattro
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2011 Audi A8 Quattro ProblemsDecreased Power and Fuel Economy from Carbon Buildup
The 2007-2017 Audi A8 with FSI/TFSI, including the W12 are direct injection engines. These engines are subject to carbon buildup in the intake system which can cause power loss, OBD codes and a check engine light, and a rough idle. In normal engines, the engine is cleaned by the gasoline flowing through the injectors and into the intake system, however, the A8 uses direct injection so gasoline does not flow through 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.
2011 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.