- Audi A4 B8 B8 Common Problems<br>Important information to help you understand your Audi A4 B8.
Common B8 problems
2. Oil consumption issues for the last 6 months. Went to the dealer 3wks ago for a replaced crank shaft seal and ECU update. So far oil consumption is holding.
3. Had the engine light go on 2 days ago, back to dealer it went this morning. A friend with a diagnostic tool, states that it was a boost pressure regulation issue.
I really enjoyed the A4 but these issues are really piling up. If it weren't for warranty, these repairs would have been expensive.






