I have the same problem but it comes from the rear… I can’t pinpoint what it is but it’s a high frequency rattle. And there’s this sound that comes from my engine thats pretty similar but I don’t know how to find it either. Just turn your radio up 
I have the same problem but it comes from the rear… I can’t pinpoint what it is but it’s a high frequency rattle. And there’s this sound that comes from my engine thats pretty similar but I don’t know how to find it either. Just turn your radio up