or as ford call them Fiesta RS Turbo-Brake Light Laden Valve. (they control the braking force on the rear when you have a heavy load in the car) Basically mine are fooked, 1 is seized and the other side is leaking and the £236.57 quote from fordpartsuk is rather steap (for what they are imo) !!!!!!!!
any 1 know a cheaper alternative/supplier?

part numbers : 6181561 6181557

any help would be greatly appreciated! cheers! Ben