Mine went about 4 months ago. Mark 5 GTI on an 05 plate (40,000 miles on the clock), nsf only. It was under VW warranty thanfully so was replaced. Pushed them to do the other side but they wanted to charge me £250. According to them the manufacturers do not recommend replacing both, but obviously to save themselves some cost and labour.
Had my GTI a year now and can safely say it's the most unreliable car I have ever owned. Fuel injectors replaced after 4 weeks, rattly interior, snapped spring, dodgy rear parking sensors and now the rear wiper keeps sticking. Last time I buy from a VW main dealer, their service has been appaling under the VW warranty and they basically counldn't give a sh!t after you have purchased the car. Shame as I love the car, way it looks, performance, drive and what is stands for!