RECEPTION INTERFmeans the GPS antenna is plugged in but the GPS is getting no signal.
Ensure you have nothing metallic on your rear parcel tray blocking the GPS signals from your antenna, make sure you haven't fitted metallic window tintng recently. On a sedan, the GPS antenna is on the rear parcel tray, left hand side, under the rear window. If you have some other vehicle - cabriolet, X5 etc, let us know, and I'll tell you where the antenna is.
If the antenna is unobstructed, but still no signal, then the antenna will be faulty and need to be replaced.