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Mazda CX-30 holds its value better — 66% five-year retention against 65% for the Kia Carnival. Resale value and cost of ownership, head to head.
On five-year value retention the Mazda CX-30 comes out ahead, holding about 66% of its value versus 65% for the Kia Carnival. Over the first five years the Mazda CX-30 loses roughly $9,100 while the Kia Carnival loses about $12,975 — a gap near $3,875.
First-year drop is the biggest factor: the Mazda CX-30 sheds about 3% in year one versus 4% for the Kia Carnival. If you buy used, the steeper early drop is what the original owner absorbs.