AEM’s EMS-4 Universal Standalone Programmable Engine Management System seems to be designed for the aftermarket Miata enthusiast. It's affordable, compact and from what we've found offers more features than 100% of the competition in it's price range. It really is the ideal standalone Engine Management System for modified Powersports and four-cylinder race car applications. The EMS-4 was created using AEM's powerful Series 2 hardware and includes all of its advanced features without the unneeded ancillary components.

Features:

• 4 Saturated Injector Drivers
• 4 Coil Triggers
• 8 General Purpose Inputs/Outputs
• Mag or Hall Cam and Crank Inputs
• O2 Input
• Knock Input
• 8 MB Internal Data Logger
• VSS Hall Input
• Can Data Stream
• USB Comm Port
• Compact (4.8" x 4.55" x 1.44"), weather/shock proof enclosure
• Utilizes AEMTuner Interface Software
• System is fully enabled and unlocked – Never pay for Upgrades
• Context Sensitive Help Eases Tuning Process
• Maps can be Password Protected by the Tuner to Prevent Unauthorized Usage Sharing
• Data analysis using AEMdata software.

Harness Options:

• Fab9Tuning Plug and Play Harness - Direct PNP harnesses are available for each of the NA and NB generations of Miata.  Please see dropdown list.
• Universal Mini Harness - 30-2905-0 - AEM’s high-quality mini harness for the EMS-4 includes all necessary plugs and pins to properly wire your 4 Cylinder or smaller engine.  AEM's EMS-4 mini harness includes Pins, USB Cable and EMS-4 Connector prewired for power, ground USB & CAN.
• Universal Master Wire Harness - 30-2905-96 - AEM’s high-quality, color-coded master wiring harness for the EMS-4 includes everything you need to properly wire your 4 Cylinder or smaller engine in one easy-to-follow configuration. We silk screen each individual wire function onto the body of the wire to ease the installation process and reduce any chance of misidentifying a wire during set-up.  AEM’s EMS-4 96" flying lead with fuse and relay panel wiring harness includes built-in fuses and relays for fans, pumps, auxiliary power, and more.