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2002 Audi A4

Multi-Link Suspension Components May Wear Prematurely

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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.

18 Reports

Inspect CV Boots and Joints at Each Service

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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

Engine Misfire Due to Failed Ignition Coil, Spark Plug, or Ignition Wire

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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.

16 Reports

Inspection of Water Pump and Timing Belt

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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.

15 Reports

Various Probelms Caused by Clogged Plenum Tray Drain

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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.

14 Reports

Check Engine Light Due to Faulty Torque Converter

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

14 Reports

Engine Oil Leaks

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

12 Reports

Check Engine Light Due to Vacuum Leaks, Oxygen Sensor, or Catalytic Converter Fault

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

12 Reports

Flasher Relay Failure Can Cause Erratic Turn Signal Operation

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

12 Reports

Digital Display on Instrument Cluster May Fail

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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

Use correct oil/filter to prevent sludge accumulation

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To avoid sludge accumulation inside the engine, our technicians recommend using the proper synthetic oil with the appropriate oil filter.
10 Reports

ABS Light Due to Control Module Failure

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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.

9 Reports

Water From Clogged Sun Roof Drains May Damage Control Modules

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.

6 Reports

Maintain fuel quality to avoid misfires and CEL illumination

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

Oil leaks from camshaft drive pulleys and variable valve timing hydraulics

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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.
5 Reports
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