How to Unlock BMW Comfort Access Smart Key by Key Tool Max?

 In this article, we'll show you how to unlock a BMW smart key with comfort access using the VVDI Key Tool Max.

Check VVDI Key Tool Remote Unlock Wiring Diagram if you need it.

Key info:

Aftermarket

FCC ID - KR55WK49147

Chip - PCF7953

So we go to

Special Function>>Remote Renew>>BMW>>5WK49147 E Series 315MHz Smartkey

Now if the key is an OEM key, there is a renew adapter available.

If the key is not original, we can solder it using the connection diagram and the Renew cable.

We can renew keys on Key Tool Max, Mini Prog (an XDKP30 adapter is required), and Mini Key Tool.

Take a look at the PCF7953 key circuit board after soldering it up.

Then go to

Special Function>>Remote Renew>>BMW>>5WK49147 E Series 315MHz Smartkey>>Unlock

Read the chip again on "Transponder Clone".

It's unlocked.

Now we're able to program it to a BMW.

Done! Really easy to unlock a key.

Source: http://blog.xhorsevvdi.com/vvdi-key-tool-max-unlock-bmw-comfort-access-smart-key-guide/