Is compatible with the T4A GPS Maps.

How to insert the T4A GPS Maps SD Card:

The BMW Navigator 5 has an  SD Card slot, you will have to open at the back of the  device and remove the battery to see the SD Card slot, also on the back of the device, there is another “flap” on the back of the device too which you can open (or lift rather), to connect the USB Cable that you would have received when you purchased the GPS.