Certainly there is oil leaking under the small black plastic cover in front of oil dipstick as picture shows. Not too bad, not sure what is the problem,probably is old oil seal or o-ring .
I am new ziner here,does any one have the same problem? Or anyone know which part do I need change and the part number is? I am 2006TL,thank you.

 

Tight the 10mm bolt as tight as it can,still leaking.

 

It's called a PCV valve, was $18 a yr ago.

 

You are right bro,now I know the part NO. is 17130-RCA-A02. I will go get it soon and replace it,it's easy job!
Thank you so much!