I bought a 2007 Boxster s 3.4 987 less than a year ago which has now been diagnosed as having scoring on the cylinder bores. According to the Porsche garage who serviced the car this is a know problem which will need a complete engine rebuild. Has Porsche ever admitted to this design fault and what recourse do I have to the dealer or the warranty company, whom I purchased an extended warranty with?

What actions should I now take, as I've been advised by the warranty company that I will need to have the engine stripped at my own cost before their assessor will look at the problem. This will cost appx £2000, and then possibly a £10,000 repair bill, should they not approve the claim.