On my recently purchased 2011 GTD Golf all 4 wheels are showing signs of white worm (one of them is IMO particularly bad) but my car is out of warranty (March 2011). I assume there is no chance (or not point in even trying to ask) for the local VW dealer to replace these under warranty? I have the car booked in for Air-Con regas on Friday so I was considering asking then.
Frustrating that it seems so easy to get them to replace it and the previous owner did not request this change! 
Starfox, assume you have a Mk6 as it's a 2011 car and the warranty's expired. I'd say it's unlikely you'll get your wheels replaced for free, but there's no harm in asking. However, at best, you may be offered a discount off the price of replacements as a goodwill gesture. If this happens, then you need to consider the discounted cost of replacements against the cost of getting them refurbished, which for diamond cut alloys is around £80 - £100 a wheel.
Yes - MK6 Golf. And the warranty is expired. Tried my luck today and was no good because I was out of warranty. There was some form of a goodwill gesture (basically the car had to be under 4 years, less than 60K miles, purchased and serviced from new by the current owner at the dealer and repaired at a set place in England by VW) which meant VW paid 30% towards the repair but I didn't meet all the criteria.
Got a price of £115 a wheel for repair and told to expect a year out of them. So I am not a fan of that. The other option was to fully paint the wheels but I am unsure as I do like the style of them...
