2009 Audi A3 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2009 Audi A3

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2009 Audi A3 Problems

Decreased Power and Fuel Economy from Carbon Buildup

The 2006 - 2017 Audi A3 2.0FSI, 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 A3 uses direct injection so gasoline does not flow through common carbon buildup areas. 

Possible trouble codes include: P0300P0301P0302P0303P0304, P0305, P0306.

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. 

Ignition Coils May Fail

An engine misfire may develop from one or more cylinders resulting in a loss of power and illumination of the Check Engine Light. Our technicians tell us that ignition coil failure is a common cause for this concern. On high mileage vehicles it may be wise to consider replacing all of the ignition coils if one fails to try and avoid future misfire issues on another cylinder.

Loss of Power Due to Torn Rubber Valve

The Audi A3 2.0T FSI and Audi A3 2.0TFSI engine looses power if the turbocharging system has a leak. The most common turbo boost leak 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, power loss, and engine code P0234.

If there is a turbocharging system leak, the system will need to be inspected, and the defective seals and/or valve will require replacement. 

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2009 Audi A3 Questions

how to check fuses are fitted correctly (2 answers)

trying to locate fuse for hazerd lights

hazard warning lights not working indicators ok have changed hazard light unit (1 answer)

could this be fuse problem

When the spanner appears after the service countdown, how many miles can you go? (1 answer)

The countdown has stopped and the spanner has appeared on the display. I would like to know how many miles I can safely drive without doing any long term damage. Thanks.

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2009 Audi A3 Recalls

Anti-lock Brake System, Electronic Stability Control Fails

The anti-lock braking system and electronic stability control may fail to activate when needed due to a failure of the control unit that operates the systems. Dealers will update the anti-lock brake system control module software to perform a diagnostic test, and will replace units that fail this test free of charge to resolve the concern.

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

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.

Potential Fuel Leak During Extreme Driving Conditions

Under extreme driving conditions, fuel can leak from the fuel tank vent valve. The internal spring may be too weak to hold the valve closed. Any fuel leak increases the risk of a fire. Dealers will replace the affected valve with an improved design. The recall is expected to begin by November 16, 2009. The Audi recall number is 20Q3/J3.

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