Keyecu 3 Button Smart Remote Key CAS3 for BMW E60.E61.E90.E92 315LPMHz With ID7944 Chip(315lp mhz) It is a new full remote case support 315LP MHz CAS3 System Please note this is an aftermarkert replacement remote key but will function like the original You need program it at locksmith or dealer before to use it Please ensure your current key and key blade fits exactly the same inas the cover picture. Keyecu is professional replacement key supplier,if you have any confusion on selecting keys please feel free to contact us