The ME221 MX-5 Plug-In is the latest Plug-In Engine Management System for the Mk2 (3 Plug NB) MX-5 / Miata, years 1999-2000 1.6/1.8

Every major and respected MX-5 Tuner in the UK, as well as the biggest, Flyin’ Miata in the US, now uses and recommends the ME221 Engine Management System over other systems – see our forum post here for more details and feedback on the system

Nick, Skuzzle Motorsport – review from MX5Nutz
“I have just spent the last few weeks playing with the fairly recently released Motorsport Electronics ME221 PNP ecu and finally after years of supplying, fitting, mapping MegaSquirt of all shapes and sizes, I am proud to announce that from this day on, my ECU of choice for most MX5 applications is now the ME221.”

VIDEO INSTALL GUIDE

It supports the 1.6 and 1.8 model from the same hardware, and also fits the OEM case, which means the conversion installs tidily into the OEM position. The only extra thing you need to do besides plugging it in is run a MAP vacuum hose (supplied) from the ECU to the intake manifold.

Uses the ME221 ECU Core (Freescale Automotive Processing Power)
Supports all factory sensors.
Truly Plug-n-Play :
16×16 Fuel and Ignition Tables (with dual table switching)
VE based fuelling algorithm.
Run any type of high impedance injectors.
DSP Knock Control
in-built 21psi MAP sensor (or use your factory AFM)
Closed Loop Boost Control, Protection anb Boost by Gear
Closed Loop VVT Control
Launch Control and ALS
Fully Sequential Injection
In the field regular FW updates and improvements
Uses the powerful MEITE tuning studio.
An open approach to firmware/software features.
Supplied with rolling road certified and developed basemaps for either turbo or NA setups.
Package contents:
ME221 PnP Core Board
Vacuum Hose
Stickers
If you wish to run without a MAF sensor, then you will need to install an Intake Air Temperature Sensor – some models have a separate IAT sensor already – available in the options list.
Note that some EU models of the 0105 have a smaller case, you will need the larger case from a US/UK model, readily available on eBay.