MX5Link - MX5NAX

Link G4X PlugIn ECU for NA MX-5 / Miata

Give your NA Mazda MX-5 modern engine management without touching the factory wiring loom. The MX5Link MX5NAX is a genuine Link G4X PlugIn ECU built to drop straight into your factory OEM enclosure. It is easy to install, affordable, and built on the reliable Link G4X platform.

Why MX-5 Owners Choose MX5Link

• True plug-and-play fitment: Installs inside the factory OEM enclosure with no alteration of the factory wiring loom required.
• Latest Link G4X engine management technology: A genuine step up from the factory ECU for owners chasing more tuning potential.
• Onboard MAP sensor: Includes a 4 bar or 7 bar MAP sensor.
• Factory feature support: Most factory features are supported, with I/O expansion options available for further setup development.
• Manual transmission only: Designed specifically around manual NA drivetrains.
• 2-plug ECU models only: Confirm your connector matches the header shown in the listing photo before purchasing.

Suitable Applications

• 1600 1989–1997 NA MX-5 (B6ZE/RS)
• 1800 1989–1997 NA MX-5 (BP 1.8L)
• 1800 323 GTX
• 1800 323 GTR

Please Note Before You Buy

• Not compatible with NB, NC, or ND models.
• Fits the 2-plug ECU only; not suitable for later 3-plug models.
• Knock control is not available on this ECU.
• E-Throttle requires a modification before it can be used.

For NA-generation MX-5 owners in Canada and across North America, the MX5Link MX5NAX provides a straightforward path to engine management upgrades without custom wiring or guesswork.