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Problems for specific Audi A4 years:

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Most reported 2003 Audi A4 problems

 

Verified for the Audi A4

An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light. Vehicles equipped with spark plug wires may also develop a misfire caused by a failed spark plug wire.

29 Reports
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Verified for the Audi A4

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.

23 Reports
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Verified for the Audi A4

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.

22 Reports
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Verified for the Audi A4

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

21 Reports
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Verified for the Audi A4

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

19 Reports
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Verified for the Audi A4

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.

18 Reports
Me Too

Verified for the Audi A4

Our technicians recommend having the constant velocity (CV) boots and CV joints inspected at each service. Servicing torn CV boots early can prevent the need to replace the CV half shaft or CV joint.

16 Reports
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Verified for the Audi A4

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

15 Reports
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Verified for the Audi A4

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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Verified for the Audi A4

The digital display portion of the instrument cluster may fail. Our technicians tell us the entire instrument cluster will need to be replaced to correct this concern.

11 Reports
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Verified for the Audi A4
To avoid sludge accumulation inside the engine, our technicians recommend using the proper synthetic oil with the appropriate oil filter.
11 Reports
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Verified for the Audi A4

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.

10 Reports
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Verified for the Audi A4

The Cabriolet convertible top mechanism can fail due to hydraulic fluid leaks. The fluid reservoir is a common failure.

9 Reports
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Verified for the Audi A4

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.

8 Reports
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Verified for the Audi A4

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

5 Reports
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