He sold the cts-v v1 and ended up buying a v2 due to warranty coverage issues, but he didn't fight hard enough in my opinion.
If you have original warranty it would seem likely that BMW would sell you an extension, check the ask a dealer sub forum or a forum sponsor.
Keep us informed.
Herbert - '12 X5 35d / Sapphire Black / Black Perf Nevada / Aluminum trim / ZPP / ZPS / ZCW / ZAV / Apps / 3rd row
Betty - '04 CTS-V / Black Raven / Black Leather & Suede / 6 speed LS6 combo 400 hp & 400 tq
Sterling - '06 Silverado HD / White / Grey Leather / LBZ Duramax - Allison 6 speed combo / Crew Cab Short Bed LT3