The original TCA rear bushes fitted to all the Fabias, Polos (9N) and Ibizas (6L), except Cupra, were voided bushes, this means that there are holes or voids through them to make them "soft" while still being able to control the movement of the front suspension TCA. When the new Golf arrived, it came with a similar TCA design, but it had 4 webs where the smaller cars had two, it seems that VAG have now decided to got that design of bush on to the Fabia, Polo (9N) and
Ibiza (6L) except Cupra. Cupra gets a solid rubber bush with an outer aluminium skin so it is not so easy to fit into the aluminium consoles - there is a danger of cracking them if you are clumsy. The smart money is to NEVER replace any voided bushes with anything other than the Cupra bushes - I got a VAG indie to change the bushes on my wife's Polo 9N a few years ago and they are still as good as new and the "feel" of the steering etc is far better than with the voided bushes. The high cost of fitting these bushes at the VAG dealers will include a full four wheel re-alignment as they remove the lower cross member and consoles - as will a proper VAG indie, if a VAG indie gives you a seriously low price then I'd doubt if he has the kit to carry out the full four wheel re-alignment and might say that its not necessary - this is not true and you will pay with extra tyre wear and end up with a car that feels and drives like a crab (I've never driven a crab though!).