Default LG P760 Bluetooth Carkit noise

Since CM10 i have Bluetooth Carkit issues with my LG P760. Streaming MP3 audio is working, but phone calls give a big noise. I have also tested with several carkits. All with the same problem. At this moment i am using MIUI v5 (JB 4.2.2) EN P760 from ZduneX25, but also with this rom Carkit problems.

Is there someone who has a solution for this problem?