2008 Audi A5 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2008 Audi A5 Quattro
Never overpay. Check prices with our estimator
2008 Audi A5 Quattro ProblemsDecreased Power and Fuel Economy from Carbon Buildup
The 2008-2017 Audi A5 Quattro 2.0TFSI and 3.2FSI direct injection 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 A5 Quattro 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.
2008 Audi A5 Quattro RecallsAir Bag Control Unit Fails
The air bag control unit may corrode and fail. Dealers will replace the air bag control unit free of charge to resolve the concern.