Clamp SIP problems

After 3000 miles and two years installed on the bike to get more game started the brake lever as if tubiese air, I changed the brake pads and I bled but the problem is, I wonder if they have had internal problems with this clip:

 I wonder if you have any type of warranty because my client asked me a warranty replacement brake caliper.

 I hope to hear from SIPSCOOTER.


please help me, is possible repair this problem with   or