ECsave Smart Remote Key Shell 3 Button for BMW CAS4 F Platform X1 X3 +Uncut Blade Red This is a brand new remote key case for you to replace your worn or broken case. All you need to do is to move the internal components from your old remote to our new case. This is an after market replacement key case. Please make sure the key case is compatiable before purchase. NO interior (remote / electronics / transponder chips / battery) unit inside.