My wife lost the keys including those of my fabia 2011 very near to where we live. Luckily we have the spare key. What is the possibility to change the code of my key and that of the car to avoid someone using the lost key.?? 🤔 

It's not as bad as that, the lost key, can be deleted from the ECU using most diagnostic software. 

@jojocity, why don't you just buy a good steering wheel cover/lock to protect that car, and organise a new second key - then the missing key will get removed from the car's  ECU when you hand the keys you have in  when getting the new one coded to your car.

 

Only having a single key for a car could end up being extremely risky/inconvenient some time in the future.

can you recommend a diagnostic software that i can get hold off , maybe i can do this procedure? thanks  

I'd think that your best plan is to get a good VW Group Indie to sort this out or get, I don't think that there is any DIYer level software to do this job, security is taken seriously.

If you have the key pin code that used to come with a new car then it's quite easy with VCDS. I did it on my old 2007 Roomster, but that came with the key matching pin code on purchase in a little plastic tag. I know those codes were not supplied after some time and the dealer diagnostic computer now queries the main server for them and the key exchange is even hidden from the dealer.

@aubrey, you were lucky, when I bought a new factory order VW Polo for my wife back in September 2002, VW had just discontinued providing that info, reason given was that the original customer usually bins that "useless" plastic tag - so it is normally never available when needed.

I think VagTacho can obtain it

1 hour ago, aubrey said:

I think VagTacho can obtain it

Or was it VAG Commander or maybe both, another "thing" I just had to buy  about 20 years ago - and never used!

 

Which is okay as it was probably a scammed/cloned bit of S/W and I should have known better!