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Lexus IS holds its value better — 67% five-year retention against 67% for the BMW Z4. Resale value and cost of ownership, head to head.
On five-year value retention the Lexus IS comes out ahead, holding about 67% of its value versus 67% for the BMW Z4. Over the first five years the Lexus IS loses roughly $13,732 while the BMW Z4 loses about $18,235 — a gap near $4,503.
First-year drop is the biggest factor: the Lexus IS sheds about 5% in year one versus 9% for the BMW Z4. If you buy used, the steeper early drop is what the original owner absorbs.