The valve has never been recalled, only the coolers. 440,000 of them in the UK market are being recalled as there have been further instances of failure, the cooler has been redesigned (again) and there is a change of software along with it. The majority of these cars will have had a previous recall but not all are effected. Four hours is the work time, in reality by the time the car cools down enough to work on it and it’s processed through a loaded workshop it’s there for the day, plus it may already have started to melt the manifold and in that case it’s there overnight. They won’t provide courtesy cars as they won’t pay the costs associated with them.