Fiat 124 Spider to ND Miata Compatibility / Interchange Guide

Comprehensive guide showing which parts from a 2017+ Fiat 124 Spider fit a 2016+ ND Mazda Miata, and vice-versa.

While the Fiat 124 Spider looks significantly different from the 4th generation (ND) Mazda Miata, it is, in fact, based on the Miata chassis. While Fiat did a great job of trying to differentiate its version with its exterior styling, its own 1.4L Turbo engine, and slightly disguised interior, there are still many parts that are exactly the same, or at least cross-compatible between both cars. That’s no surprise, considering they are built alongside each other at Mazda’s Hiroshima, Japan plant. What does that mean for us Miata / 124 Spider owners? Greater parts availability, knowing which parts are directly interchangeable, and, more importantly, the ability to customize our cars using OEM parts from the other manufacturer. This compatibility guide is meant to be a reference point for ND Miata and Fiat 124 Spider owners looking to upgrade or replace certain parts, with parts from the other manufacturer’s counterpart. Parts that are a direct bolt-on fit will simply be marked “direct fit”, while parts that require other components or modifications will have more detail. ExteriorConvertible Soft top: Direct Fit. All trim levels of the 124 Spider use the same soft top as the Grand Touring (GT) Miata, which has an extra inner liner for insulation and sound deadening. The Miata Sport and Club top will still fit a Fiat. Soft Top Latch: Both the front latch and the rear latch / release mechanisms are the same. Soft Top Weatherstripping / Seals: Direct Fit, same parts.Windshield: The windshield on the Fiat is apparently thicker than the one on the Miata. We have yet to verify on our own if they are cross-compatible, but would be willing to guess that they are as long as the corresponding windshield seal is used as well. Plastic Windshield Surround Trim (3 pieces): Physically the same, although the Fiat ones come in more diverse colors. These are directly compatible, but it’s nearly impossible to remove the trims (the center one mainly) and keep their mounting tabs intact for reuse. Wiper Cowl: Direct fit, same parts.Wiper Arms: Direct fit, same parts.Wiper Motor / Wiper Transmission: Direct FitDoor Mirrors: They look almost identical, but the base on the 124 Spider ones is slightly larger. Window Glass: Physically the same, but there would be a visible mismatched Mazda or Mopar logo if used on the on the other car.Exterior Door Handles: Direct FitDoor / Window Moldings (top of door): Direct FitDoor Sill Plates / Scuff Plates: Direct FitFender Marker Lights: Direct FitAntenna: The antenna itself is a direct fit, but the mounting base differs due to the different contours of the quarter panel. Rear Bumper Marker Lights / Reflectors (red): The 124 Spider Abarth uses the same marker lights as the ND Miata, but the other model 124 Spiders use a different style. Wheels and Tires: While differing in style, all the wheels and tires and directly compatible across both cars. The exception being on cars that came with the factory Brembo brakes, which require the ND BBS wheels or 124 Abarth wheels for caliper clearance.

Hood, Bumpers, Fenders, Doors, Sideskirts (rocker panels), Trunklid, Headlights, Taillights, Running Lights, Gas Lid, Third Brake Light, Quarter Panels: Do not interchange. InteriorSeats: Direct Fit, as long as you have the same options on your car, in particular the seats that have speakers integrated into them. We installed ND Club seats into a 124 Abarth and 124 Abarth seats into the ND Club with no adverse effects. Even though the ND didn’t have seat heaters like our Abarth did, they still plugged right in and the other electronics on them worked (airbags, speakers, occupancy sensors).