13 months after the last one, my OSR spring goes again. This time it went ping and made an awful racket when driving so was a little more obvious. I know have a golf spring instead of the Euros one. Speaking of Euros, awaiting phone call as just over a year or less than 15,000 miles is poor. 

Interesting, mine is now just over 5 years old and have had all 4 replaced. Front OS first last year, tyre fitter found it when replacing a tyre I told them to  replace the other side also, then the rear OS this year found when having MOT, replaced the other side as well.

I guess they just aren't strong enough for the cars. My wife's golf suffered the same fate. They were replaced with eibachs, wish I had done that now, but the spring only has to last 18 months and then I can get a new car