Will Moroso aluminum coolant expansion tank (NC) fit a Mazda Miata NC (2006-2015 US model years)?
Added · Updated
Short answer: Yes, reportedly Reported
Verdict:Fits Reported confidence (2 of 3) · 3 sources
Yes, reportedly: Aluminum replacement for the pressurised plastic NC tank.
| Part | Moroso aluminum coolant expansion tank (NC) |
|---|---|
| Vehicle | Mazda Miata NC (2006-2015 US model years) |
| Years | 2006-2015 |
| Trim / condition | all NC |
| Verdict | Fits Reported to fit |
| Confidence | Reported 2 of 3 — Stated by one reasonably reputable source (retailer, shop, magazine). Not independently confirmed. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
Aluminum replacement for the pressurised plastic NC tank. One vendor calls it a bolt-in for all NCs; a club article says it bolts on like stock with the right hose outlets and a sight glass, and a magazine build recommends it as cheap insurance.
Related known issues
Related build entries
Other cooling fitment for the NC
- Koyo-built stock replacement style radiator, plastic tanks (NC, MT and AT) — Reported to fit Fits
More for this car
- All Mazda Miata NC (2006-2015 US model years) fitment answers · NC common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- Moroso aluminum coolant expansion tank for NC — Flyin' Miata (parts vendor) (vendor article; read 2026-10-26; full page read)
- Easy Replacement for More Miata Displacement (NC 2.5-liter swap) — Grassroots Motorsports (editorial; read 2026-10-26; full page read)
- NC coolant tank replacement (Sept. 2020 tech article) — Midstate Miata Club (club tech article) (editorial; read 2026-10-26; full page read)
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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