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Miata ECU tune

Your Miata

Pick your year to see what fits.

There was no 1998 Miata in the US. The NB model started as a 1999.

+5–15 whp (est.)
Easy$200–$4001 hr
All Miata mods

Why do it

A reflash adds power across the rev range and smooths out the factory tune.

Tools you'll need

Starting out? See our budget tool list.

Parts to buy

Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.

Before you start

  • Don't let the battery die while flashing. It can damage the ECU.
  • Don't let the battery die while flashing. It can damage the ECU.

Steps

  1. Flash the tune

    • Connect the laptop to the OBD port, read the factory tune and flash the new one.
    Watch this step (Flywheel Films, on an NC) (2:12–5:45)

  2. Set up the software

    • Install the software and connect it to the car.
    Watch this step (DriveMX5, on an ND) (0:21–0:56) Watch the ECU prep (0:56–1:56)

  3. Flash the tune

    • Flash the tune to the car.
    Watch this step (2:41–3:36)

How to know it worked

Did this guide work for you?

Safety first

  • Park on flat ground, set the parking brake and chock the wheels.
  • Never get under a car held up only by a jack. Use jack stands.
  • Let the engine and exhaust cool first.
  • Disconnect the battery before unplugging electrical parts.
  • Wear safety glasses.
  • If something doesn't match your car, stop and ask a shop.

Follow your part's instructions and your service manual's torque specs.