@Jason1701 I have iNav system with android auto on original Harman system and I have EXACTLY the same issue. Bad quality audio thru wireless android auto and it feels left based. This unit is using AUX input (internally, not with the plug), so I thought maybe the AUX is ****.
My OEM Bluetooth audio is dropping connections all the time so I cannot use it.
@Nuno Miguel Monteiro you can do that like on one model year on early facelifts only, older Harman cannot be upgraded.

 

I understand. You dont have harman, but bosch system.

If you have harman you can upgrade to pro 10. If you have bosch (blue screen) you can not.

 

I have Harman. You cannot upgrade 2016 Harman to OEM Android/Carplay

 

If your car vin finish in JCK, you have harman, and you can upgrade to oem pro 10 system with Mo, from retrofits. He unlock carplay/android auto in Pro 10 system (10 inch screen)

if your vin does not finish JCK before the numbers, you have version 2 of bosch, and only option is the chinese android system.

 

The 10.25 android car play screen in my XE sounds great. You mention one sounds fine and the other one is messed up. Are they the same brand?
If no, then try another brand that might work better.

If yes, then I think you have a problem with the unit and they should exchange it, not have you try to solder a board or check for problems.

 

My car has the harman system but doesn’t have JCK. This retrofit is apparently only for 2018 models and above.

 

I've been monitoring this thread and im in the same situation. My VIN Number doesn't have JCK as part of the VIN serial.number. Too bad....

 

what letters does yours have in the VIN? Mine is GMK… wondering if yours is the same and there is something different about our builds…

 

I have a different VIN. I don't know how Bosch sounds, so I cannot compare to our Harmans. But Bosch AUX is plugged physically to the AUX input in the armrest, ours is connected by the harness.
Also I think that most of the chinesse units are basically the same and differs in CPU and RAM, I did not read anywhere that one should have better audio than others.