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Problems for specific Audi A6 Quattro years:

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Newest reported 2003 Audi A6 Quattro problems

 

Verified for the Audi A6 Quattro

Fuel quality must be maintained to avoid engine misfire problems; the misfires may cause the Check Engine Light to illuminate.

3 Reports
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Verified for the Audi A6 Quattro
Oil leaks from the camshaft drive pulleys and variable valve timing hydraulics are common. If the variable valve timing hydraulics is leaking, the Check Engine Light may illuminate from inaccurate valve timing.
3 Reports
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Verified for the Audi A6 Quattro

Premature wear in various multi-link suspension components can cause noises that are difficult to diagnose. Worn suspension parts can also cause uneven tire wear and create steering alignment problems.

20 Reports
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Reported by Sandy28 and 1 other for the Audi A6 Quattro

I noticed my gas gauge wasn't working after I re-fueled. The speedometer gauge had not been working right for a while. It constantly kept going up and down. When I tried to get info from knowledge techs, I was told the Instrument Cluster had gone and would need a new one put in (which I know is pretty darn expensive. I did some research on my own. I found that there is a sensor that can go bad, that connects the gas and speedometer gauges...

2 Reports
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Verified for the Audi A6 Quattro

Vacuum leaks, oxygen sensor failure, and catalytic converter efficiency faults can cause the Check Engine Light to illuminate.

23 Reports
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Verified for the Audi A6 Quattro

The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.

17 Reports
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Verified for the Audi A6 Quattro

Engine oil leaks are common from the valve cover gaskets and camshaft chain tensioner gasket.

12 Reports
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Verified for the Audi A6 Quattro

A problem with the torque converter can cause the Check Engine Light to illuminate.

58 Reports
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Reported by bestdmitry and 2 others for the Audi A6 Quattro

Break light switch becomes inoperable, causing ABS and No traction control light come on, causing brake lights to stay on even with the engine shut off and car locked (as if someone is stepping on the brake pedal). Problem corrected by replacing the brake light switch (located in the driver's side compartment, above the brake pedal).

DIY links:
http://www.2carpros.com/questions/audi-a6-2003-audi-a6-changing-the-brake-light-switch

http:/...

3 Reports
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Verified for the Audi A6 Quattro

Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.

15 Reports
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Verified for the Audi A6 Quattro

An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light.

11 Reports
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Verified for the Audi A6 Quattro

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.

10 Reports
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Verified for the Audi A6 Quattro

A fluid leak may develop from the propeller shaft seal on the rear of the transmission. Our technicians tell us that replacing the seal will commonly correct this concern.

33 Reports
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Verified for the Audi A6 Quattro

The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.

30 Reports
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Verified for the Audi A6 Quattro

Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.

14 Reports
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