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2016–2025 Mazda MX-5 Miata Ignition FAQ's

Please read our FAQs page to find out more.

What plugs should I run on a tuned or boosted ND?

One step colder with a tighter gap helps prevent blowout under boost. Always match heat range/gap to your tune and fuel.

Are coil upgrades helpful on NDs?

Healthy coil‑on‑plug units support strong spark; high‑output replacements add margin at higher cylinder pressure. Pair with quality plugs and verify dwell control in the tune.

How often should I service ignition components?

Inspect plugs after events and replace as needed. Heat and DI mixtures can shorten life—keep a spare gapped set for quick diagnostics.