I check with expert in hk. they say sony no issue KSS213Q model, it is made by china only.
I also checked the web sit for KSS213 family. No KSS213Q are made by sony japan.
So I think your head is also made by China.
anyway, I suggest you buy a one for replace, because it's life not long.
Is it every cd are same problem, if yes, that the head or machine may have problem. I am not expert on this.
You can call KK sir or to the follow web site:
http://review33.com/avforum/
find member 254 to help, he is very good guy and expert on cd head repair.
The sony KSS2213c is buy from him.