Wondering if anyone can help.

I have a seized rear caliper on my Octavia which has the 310mm rear discs and it needs replacing. All of those I can find online and at motor factors appear to be for the 272mm brakes. Are the 310mm Golf GTI calipers, which I can find online, the same and will they fit?

On the 310x22mm rear brake discs, the Octavia MK3 uses TRW rear brake calipers and the Golf MK7 uses ATE rear brake calipers.

Edited 12 June, 202512 Jun by Carlston

Thanks. I've taken the broken caliper off and found a refurb company in Nottingham. Will take it to them tomorrow and hope they can do something with it.

New calipers for rear vented discs are hard to get for mk3 octavia as they are mechanical, much easier to get ones for cars with electric handbrake, unfortunately.

Try https://brakeparts.co.uk

Have found them pretty good at getting less common calipers and discs.

Alasdair

Out of curiosity, I've checked that website, 2 variants and both out of stock, nothing new, the likes of autodoc etc have the same lack of stock.
Most rear 310mm vented brake calipers for mechanical handbrake that you can buy at all are refurbished. Not an easy item to get a replacement for nowadays as no one is making them new, only ones for electric handbrake are still made.

How does this one look?

https://www.autodoc.co.uk/trw/17409853

It will fit (make sure it's the correct side :) ), but it is also refurbished / remanufactured, there's a £35 core charge on top of price to return old ones to them.

The only new ones I know of are straight from VW/Skoda, at nearly GBP300 a piece, that's close to £600 for 2 new rear 310mm mechanical handbrake calipers.
For example here:
https://www.skoda-parts.com/spare-part/5f0615423-brake-caliper-rear-left-skoda-39953.html
https://www.skoda-parts.com/spare-part/5f0615424-brake-caliper-rear-right-skoda-39954.html
I have ordered from this supplier many times, the service is very good, but at these prices, I'd rather stick with what I've got.

I looked into the topic last year as I considered upgrading my vRS TDI brakes to the full 340mm / 310mm combo, but in the end decided to stay with 312mm/270mm and just put EBC yellow pads all round. Works well enough for me, just like on all previous Skodas I had/have, and parts are readily available, unlike the mechanical handbrake 310mm rear calipers.

Edited 15 June, 202515 Jun by dieselV6