These are a common failure, and cost around £100 from Ford.
I have a spare boxed one which has only done about 2,000 miles, as it was not the fault on my van.
It is on ebay, ending today, and remarkably is still at 99p. If anybody needs one of these, the item no. on ebay is https://www.ebay.co.uk/itm/161261220892

