As mentioned - something or nothing! - glad its something simple.
Chinese ones on ebay or jungle web site ones are fine - The one I got was from Hong Kong and had its VW PN ground off, VW are in China, suspect it was genuine part for domestic china.
it could also be the evap valve, if the fault comes back after a month it will be that - genuine ones are Bosch, just get genuine Bosch at 1/2 the price of VW one.