[roadriderg]

I had my light come on for cel on my 2007 328i sulev sedan. The code set was for secondary air system failure. This is what happened next.

1. Verified blower was working but no air coming thru exhaust. They changed
the exhaust air inlet valve. It did not correct the problem.

2. It was decided that the ports inside the head where blocked so that the cylinder head had to be removed to be cleaned.

3. After repeated cleaning attempts the head could not be cleaned.

4. A new cylinder head with valve train was ordered.

5. While removing the head the radiator was broken.

6. The radiator was replaced with new hoses.

7 it was put back together then started showing codes for cylinder misfire.

8. They replaced all coils and spark plugs.

9. Oil change and coolant change.

10. Main problem was that the valve guide seals had hardened and were slightly leaking oil. Just enough to block tiny exhaust ports for the smog system. Even with the head off they are in an area that is hard to reach.
So they could not be cleaned.

All this under sulev warranty. Car had 125,000 miles. I am very happy with bmw. They fixed my car with no question or problems. I estimate this was around a $8,000.00 repair.