2007 Audi A4 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2007 Audi A4 Quattro
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2007 Audi A4 Quattro ProblemsDecreased Power and Fuel Economy from Carbon Buildup
The 2006-2016 Audi A4 Quattro uses FSI and TFSI 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, since the A4 Quattro uses direct injection, 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.
A turbocharged engine looses power if the turbocharging system has a leak (boost leak). The most common turbo boost leak for the A4 Quattro 2.0 FSI is a torn rubber diaphragm on the diverter valve, which is intended to open only if pressure gets too high. Common symptoms are increased turbo noise when letting off of the gas pedal, and power loss.
If there is a turbocharging system leak, the system will need to be inspected, and the defective seals and/or valve will require replacement.
The flywheel for the 2006-2008 Audi A4 Quattro with the 2.0 FSI Turbo engine is a non-conventional "Dual Mass" flywheel. It is known to make light rattling noise when the engine is cold, and should subside once the engine temperature raises. If the rattle doesn't go away when the engine warms, the flywheel may have failed.
If the dual mass flywheel has failed, the only solution is to replace the flywheel.
2007 Audi A4 Quattro QuestionsThe wipers start and stop at random and the hazard lights won't turn off. (1 answer)
We have tried to replace the comfort module but it did not help. When I put the wiper fuse in they start and won't stop.
It would lose power only now and then and specially I when I step a bit more on the gas. And the engine light comes on and flashes for 4-5 times and goes away. What does this mean and am I able to fix it myself?
I have checked for leak and there seems to be no leak.. Now it's showing that the car needs to be serviced . Do you think anything is wrong with the gauge?