I've a problem with an 06 Forester XT. The dealer has now replaced both secondary air valves - one under warrantee. The lights are on again, and now the dealer says that it's the secondary air pump(?) - code P0410. That's not under warrantee and is a $700+ repair! Is this a common problem or am I getting hosed? - they tell me that the part is not in the USA? Anybody know the part number and where to buy a used one??