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Audi
,
A6
,
C4
, 2.8 Quattro
(1994-)
Common Issues
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Water pump failure (10-15% failure rate)
Alternator bearing failure (5-7%)
Timing belt tensioner failure (4-6%)
Turbocharger oil leaks (3-5%)
CV boot and joint wear (3-5%)
Engine coolant leak due to faulty thermostat housing gasket (2-4%)
Faulty oxygen sensor (2-3%)
Transmission solenoid pack failure (1.5-3%)
Rear main seal oil leaks (1-2%)
Idle air control valve failure (0.5-1.5%)
Fuel system clogged fuel filter (0.5-1%)
EGR valve failure (0.5-1%)
Brake master cylinder failure (0.3-0.6%)
Power steering pump failure (0.2-0.4%)
Air conditioning compressor failure (0.2-0.4%)
Rear shock absorber collapse (0.1-0.3%)
Front lower control arm bushing wear (0.1-0.2%)
Steering rack and pinion play (0.1-0.2%)
Ignition coil failure (0.05-0.1%)
Engine block cracks (rare, 0.01-0.05%)
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