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BMW I3 vs BMW M6: 5-year value retention (39% vs 52%), resale value, and cost of ownership head-to-head. BMW M6 holds its value better.
On five-year value retention the BMW M6 comes out ahead, holding about 52% of its value versus 39% for the BMW I3. Over the first five years the BMW M6 loses roughly $57,313 while the BMW I3 loses about $26,937 — a gap near $-30376.
First-year drop is the biggest factor: the BMW M6 sheds about 10% in year one versus 12% for the BMW I3. If you buy used, the steeper early drop is what the original owner absorbs.