hello dear fiends hope you are all fine ,

my car is octavia mk1 2003 1.6i i want to know whether the key frequency of the chip is 433 fixed code or 433 hopping code ???

99% sure its a rolling code

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what is the diffrence between them sir ???

Rolling/hopping code is the same thing. Basically the RF code changes every time for the remote locking. The chip in the key for the immobiliser stays the same 

http://www.rclick.co.uk/product_info.php?products_id=671 SO could you please tell me the item in the link is hopping or fixed and thank you sir 

I've no idea, it doesn't say in the link

Try sending them an email, I'm sure they will be happy to answer your question