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BMW X4-M vs BMW X6 M: 5-year value retention (56% vs 56%), resale value, and cost of ownership head-to-head. BMW X4-M holds its value better.
On five-year value retention the BMW X4-M comes out ahead, holding about 56% of its value versus 56% for the BMW X6 M. Over the first five years the BMW X4-M loses roughly $34,884 while the BMW X6 M loses about $60,157 — a gap near $25,273.
First-year drop is the biggest factor: the BMW X4-M sheds about 0% in year one versus 0% for the BMW X6 M. If you buy used, the steeper early drop is what the original owner absorbs.