The NC model, designed by Yasushi Nakamuta, retained some design cues from the original but shared no components with the NB. Moray Callum led the design, and it was previewed by the 2003 Mazda Ibuki concept.
Notable changes included shifting to a front wishbone/rear multilink suspension setup and introducing traction control and stability control for improved handling. In the U.S., it featured a 2.0 L MZR LF-VE I4 engine with 130 kW (170 bhp) and 190 N⋅m (140 lbf⋅ft) of torque. Transmission options included a 5-speed or 6-speed manual and a 6-speed automatic. Australia offered a 2.0 L MZR with 118 kW (158 bhp), a 6-speed manual, and LSD as standard. Europe had two engine options: a 2.0 L MZR LF-VE and a 1.8 L MZR L8-VE.
Additional features comprised a six-speed automatic transmission with steering wheel-mounted paddle shifters. Car and Driver's test results for the U.S. version showed a 0-60 mph time of 6.5 seconds. Worth noting, the NC exceeded Japanese law's width limit for mid-size vehicles, incurring additional costs for Japanese buyers.
Similar to the NB, the NC also received a facelift in 2008 and goes by the names of NC2, NCFL or the Mk3.5. Key updates include a redesigned front end with a larger grille and new headlights, restyled side skirts, rear bumper, and tail lights. Soft-top Touring and Grand Touring models feature a chrome-framed mesh grille. The hardtop PRHT Roadster Coupe also adopts a mesh grille with chrome accents. Inside, the instrument panel has darker accents and updated gauge graphics, while cabin space has been optimized by eliminating protrusions from the door pockets.