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Mazda MX-5 Miata ND (4th Generation)

2016–2025 · ND · convertible

Fourth-gen Miata (ND) put the car on a diet — back under 2,400 lb and sharper than the NC in every measurable way. 2.0L SkyActiv-G I4 (155hp 2016-2018 ND1, 181hp 2019+ ND2 after a head/intake/exhaust update that raised the redline to 7,500 rpm). 6-speed manual or 6-speed auto. The ND RF (Retractable Fastback, 2017+) replaces the NC's full hardtop with a targa-style power top. Mazda also sold a Fiat-badged version (Fiat 124 Spider, 2017-2020) with a turbo 1.4L.

Watch out: ND2 (2019+) stretchy connecting-rod bolts — Mazda's revised rod-bolt spec on the high-revving 181hp 2.0L can stretch under sustained track use, leading to rod-bearing failure. Tracked ND2 owners increasingly swap to ARP bolts preventively (~$200 part, engine-out job).