Oil leaks from camshaft drive pulleys and variable valve timing hydraulics on Audi A4 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.
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Average mileage: 85,000 (85,000–85,000)
Engine affected: 3.0L V6
5 model years affected: 2002, 2003, 2004, 2005, more2006
8 people reported this problem
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problem details
2003 Audi A4 Quattro - 3.0L V6 85,000 mi,
MIL came on with camshaft issue and engine performance. changed cam timing sensor MIL still activated Further investigation highlighted this issue
Replaced caps and seals.