VW Golf traction control (ESP) fault

[briwire]

4 year old Golf 1.4, ESP light came on and I had it analysed at a local garage, who came up with the following fault report:-

001435 Brake 1 pressure sensor (G201) (1435) MEM

I am waiting for the warranty to come through before I progress it, but anyone know whats involved? Is it major? What sort of cost, hopefully i won't be paying.

 

[stuartturbo]

If i remember correctly that is part of the Abs unit internal which cannot be replaced as a component.
So New ABS unit

 

[Mursal]

ESP saves lives, fact

Valve in ABS unit as above