2007 Audi A8 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2007 Audi A8 Quattro
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2007 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.
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.
2007 Audi A8 Quattro QuestionsHow do I troubleshoot my rear window defroster? (1 answer)
When I press the dashboard button for the rear defroster, the light comes on and, the outside mirror defrosters, which are also controlled by the same switch, begin to defrost. I have no indication the rear window defroster is working no matter how long I wait. I don't see a fuse specified in...
2007 Audi A8 Quattro RecallsSunroof Glass Is Not Secured To The Sunroof Frame
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.
The air bag warning light and passenger side air bag off notification light may illuminate due to low battery voltage. If this occurs, the passenger air bag will not deploy in an accident. Dealers will reprogram the air bag control module software. The Audi recall number is JR. This recall began on December 5, 2006.