2009 Audi A4 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2009 Audi A4
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2009 Audi A4 ProblemsDecreased Power and Fuel Economy from Carbon Buildup
The 2006-2017 Audi A4 2.0FSI, 2.0TFSI, and 3.2FSI are 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.
2009 Audi A4 QuestionsI'm looking at 2009 Audi A4, 2.0L quattro and have a few questions about it? (1 answer)
The car has just a bit over 100k miles on it, clean record and no accidents. This would be my first Audi to own if I were to buy it, so I don't have enough info about it. Any advise on buying this car, engine performance, reliability and maintenance. I was wondering what will I be looking for...
2009 Audi A4 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.
The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag inflator free of charge to resolve the concern.