Think it was £2.5k to replace front callipers, discs and pads
I paid a small contribution towards it as I argued the case with Peugeot and got them to stump up the lion's share of the bill.
The brakes are made by Alcon, not Peugeot. Absolutely superb stoppers. However, the pistons themselves are chrome plated.
So you get an issue of dissimilar metal corrosion; where two different metals are in contact in a corrosive environment and one of the metals (the pistons) experiences an accelerated corrosion rate.
Give it a UK winter or two and the pistons eventually seize, which then prematurely wears those huge disc rotors and causes an expensive mess.
All they needed to do was to use stainless steel pistons instead, which you can purchase and retrospectively fit. Think the stainless steel pistons and seal kit was around £250 from Godspeed Brakes.
You can't even purchase the brakes direct from Alcon. Only via Peugeot.
So people have either swapped the Pistons or replaced the callipers and rotors with units from Tarox or other after market manufacturers.
I would only ever purchase a facelift version (resolves fuel tank issue plus cylinder misfire issues that can occur) that also has the extended Peugeot warranty.
But to be fair, there are other cars for the money you could buy that won't give you the same headaches.