Is it still in good working order? If so I wouldn't hasten to change it, it is one of the finest routers TalkTalk have produced. TalkTalk don't usually replace routers unless they are known to be faulty.
Having said that if you wish to upgrade, or negotiate a new contract then it is worth asking the customer loyalty team for a new router as part of any deal.
But when the support team pick up on this I will probably be proved wrong, so wait and see what they say!
I'm sorry for the delay. Just to confirm, are you experiencing any issues with the connection? If the connection is ok, however you would like a more current router then it would be worth contacting our Loyalty Team directly to see if they can offer a new router as part of a renewal.