My car has 50,800 miles. If I ask the dealer for an extended warranty will they still do it? The car has been BMW Certified Pre-owned since I bought it in June and under warranty. Am I too late?

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2008 X5 3.0si base
Sold-2005 X5 3.0 sport pkg
Sold-2003 X5 3.0 sport pkg
1971 Pontiac GTO 455
E46 M3 Conv. SMG