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Audi
,
A6
,
C4
, 2.0 100
(1994-)
Common Issues
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Common Issues
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Faulty oxygen sensor (10-20% of cases)
Timing chain tensioner failure (5-15% of cases)
Coolant leak from water pump or head gasket (5-15% of cases)
Bad catalytic converter (5-10% of cases)
Engine oil leaks from valve cover gasket (3-8% of cases)
Faulty temperature gauge sender unit (2-7% of cases)
ABS sensor failure (2-6% of cases)
Brake pad wear and master cylinder issues (1-5% of cases)
Air conditioning system leaks or compressor clutch problems (1-4% of cases)
Rear main seal leak (1-3% of cases)
Head gasket damage due to overheating (0.5-2% of cases)
Water pump failure (0.5-2% of cases)
Faulty alternator or starter motor (0.5-1.5% of cases)
Fuel system issues, such as faulty fuel injectors (0.3-1.2% of cases)
Rear differential problems (0.2-1% of cases)
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