Audi A4 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Audi A4

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Audi A4 Problems

Decreased 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. 

Possible engine 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. 

Loss of Power Due to Torn Rubber Valve

The Audi A4 2.0T FSI 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. 

Rattling From the Transmission May Be Heard When Engine is Cold

The flywheel for the 2006-2008 Audi A4 2.0L Turbo 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.

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Audi A4 Questions

Enging spudders and back fires at WOT. (1 answer)

My 98 has a big turbo kit and sometimes it spudders or hick ups when accelerating/shifting. It also pops/back fires when shifting under load. Why would it start this now? Never had these issues when first bought the car?

Dear Sir/Madam, What could be the cause of the power loss,jerking and cutting o (1 answer)

Dear Sir/Madam,

What could be the cause of the power loss,jerking and cutting on an AUDI A4

Everytime i put gas the car stalls to turn on . (1 answer)

Doesn't matter how little I put it still stalls

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Audi A4 Recalls

Side Marker Lights Do Not Illuminate With Parking Lights Or Headlights On

The side marker lights may not illuminate when the headlights or parking lights are on. Dealers will upload revised software to the vehicle to correct the concern free of charge.

Passenger Frontal Air Bag Inflator Ruptures On Deployment

The passenger frontal air bag inflator may rupture on deployment, causing metal fragments to come through the air bag and injure occupants. Dealers will replace the passenger frontal air bag inflator free of charge to resolve the concern.

Air 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.

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Audi A4 Reviews

i have had so many problems with m car but i love it and will pay for whaever reapairs t needs
have an audi 2000 a4 the rain water is pooling in the battery housing and then leaking into the drivers side floor area. the water then goes into the rear floor board. have had the car for several years and have had minimal problems but this new one is frustrating the crap out of me. where is the drain for this area??? any ideas??
have a 2000 a4, have been having trouble with the rain water pooling in the battery housing and leaking into the interior of the car. the drivers floor is soaked and then the water goes into the rear seat floor board. any ideas on how to fix problem? where is the drain for this area?? sooo very frustrating

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