in this video i show you how to replace the key door lock cylinder. the bmw door key isnt made to be used every single say, its made for emergencies when the
CAS 65 Change Key, Key Battery Low; CAS 66 Remote Control/Key Fault; CAS 67 Remote Control/Key Battery Discharged; CAS 68 Remote Key Stationary Function Battery Low; CAS 186 ELV Steering Lock Fault. The engine cannot be restarted; CAS 187 ELV Steering Lock Active. Move the Steering Wheel to Restart; CAS 205 Remote Key not Present
Update: I just picked up my new key from dealership and paired it with my car using the valet key. Regarding the battery, my original key battery lasted about 10 years. For the past 8 years, I have been soldering/de-soldering replacement batteries every 2 years. For some reason, the replacement battery doesn't last more than 2 years.