Megasquirt MS3 Mini by MS LABS for Mazda MX-5 (89-05)
Megasquirt MS3 Mini — Plug-In ECU for Mazda MX-5 (1989–2005)
Compact. Capable. Cost-Effective.
If you’re looking for a powerful yet budget-friendly standalone ECU solution for your naturally aspirated, turbocharged, or supercharged Miata, the Megasquirt MS3 Mini by MS Labs is the perfect choice. Designed to fit directly inside the stock ECU case, it provides a clean, OEM-style installation while delivering the full flexibility and precision of a modern standalone ECU.
Key Features
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Sequential Injection & Ignition – Full sequential control for optimal fueling and ignition precision (requires individual coils and removal of factory igniter).
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4-Bar Onboard MAP Sensor – Built-in sensor supports up to 44 psi of boost, no external MAP sensor required.
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Analog Wideband Input – Compatible with most aftermarket widebands for accurate AFR tracking and closed-loop operation.
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Flex Fuel Input – Automatically adjusts fueling and timing based on ethanol content.
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Boost Control Output – Integrated control for solenoid-based boost systems.
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VVT Control Output – Native support for variable valve timing.
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Alternator Control Output – ECU-managed voltage regulation.
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CEL & Battery Light Outputs – Maintains OEM warning light functions.
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Launch Control / Flatshift Input – Enables advanced track features.
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Spare Digital & Analog Inputs – Extra flexibility for additional sensors or custom inputs.
Why Choose the MS3 Mini
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Direct Fit: Installs seamlessly inside the stock ECU housing.
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Versatile: Perfect for N/A, turbo, or supercharged builds.
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Comprehensive: Offers the full tuning capability of larger standalone systems.
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Reliable: Developed and tested by MS Labs, proven on Miatas worldwide.
Note:
After ordering, please specify your exact Miata model year in the order notes to ensure correct configuration and compatibility.
The Megasquirt MS3 Mini — a compact, powerful, and reliable ECU that brings full standalone control to your MX-5 without compromise.