If you plan on replacing the outside roundels the rear is a real PITA.
Feel free to email me and I can walk you through how I did it.
Long story short, I ended up having my body shop remove the chrome housing (it's adhered to the paint). I then had them paint the housing space grey (the plot scheme I have on the X5M).
They heated up the stock emblem to remove it. Then used the aftermarket on from Trinity Autosport and stuck it into the housing.
It's alot more work if you want it to look right and not mess up the housing. But well worth it.
My housing and rear emblem is going in this week.
I will post pics