I have the GA5166X and it works without any issues.

As for the Bluetooth issue, it's not really the Bluetooth that's the problem but the built in microphone that is weak. I got an extra microphone in my package that I connected and all is well.

The GPS works perfekt through SD card and phone. No issues with frozen screen or blackout.

I spoke to eonon a while back about updates and they said they would update the system if there are issues with my player (issues like the ones you have). You should contact them and request the update?

BMW X5 4.8iS 2005

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BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers