Here is showing how to unlock or renew a BMW F series HUF5662 smart key with Xhorse VVDI Key Tool Max. Certainly you can use the new VVDI Key Tool Max PRO instead. Simple operation, minutes to do.
This is the BMW locked key, it’s a transponder 49 PCF7953P chip.
BMW Smart Key
Take off the PCB.
Go ahead on Key Tool Max programmer:
Special function >> Remote renew >> BMW >> HUF5662 F Series 315MHz Huf
Here we can zoom in to check the connection diagram.
Solder the wires to PCB, then connect renew cable to Key Tool Max.
After completing soldering, press “Unlock”.
Desolder the wires from PCB to read the transponder again.
As we can see, it’s unlocked now.
BMW key renew has been successfully done.