ECU Shootout

DIYAutoTune MS3Pro Mini ECU

EntryWire-in
US$675
DIYAutoTune regular price incl. 8ft flying lead harness; collection showed 'from $599.99'Checked

The DIYAutoTune MS3Pro Mini is an entry-level wire-in engine control unit (ECU) from DIYAutoTune / AMP EFI. It has 8 injector and 4 ignition outputs and support for up to 8 cylinders. List price is US$675. 11 sellers list it from US$599 to US$922.

Prices checked . Specs from DIYAutoTune / AMP EFI's published data.

Pixel illustration of the DIYAutoTune MS3Pro Mini
DIYAutoTune MS3Pro Mini product photo
Photo: DIYAutoTune · diyautotune.com ↗

Key specs

8INJECTORS
4IGNITION
8MAX CYL
0DBW
0λ WIDEBAND
–KNOCK
1CAN BUSES
✓LOGGING

DBW = drive-by-wire throttle channels · λ wideband = onboard wideband lambda (oxygen sensor) inputs · CAN = controller area network buses.

Features

  • ✕Drive-by-wire
  • ✕Onboard wideband
  • ?Knock control
  • ✓Flex fuel
  • ✓Traction control
  • ✓Launch control
  • ✓Boost control
  • ✕Gearbox control
  • ✓Onboard logging
  • ✕Ethernet
  • ✓USB
  • ✕Built-in display

✓ published · ✕ not offered · ? not published. Some features, like traction control and launch control, mean different things by brand. See the glossary.

Details

Highlights
Compact, anti-lag, 3-step, flat shift, onboard 4-bar MAP + baro
Software
TunerStudio MS (free Lite, paid registration for full)
Logging
SD card
Links
Product page ↗
Tuning
Find a MegaSquirt tuner with a dyno
Maker
DIYAutoTune / AMP EFI: history, software and every model

Where to buy the MS3Pro Mini

11 sellers found

LowestUS$599ProTunerz · USA
TypicalUS$600median of 11 priced
HighestUS$92254% above lowest
In stock7 of 11as listed
ProTunerz ↗
USUSA in stock
USD 599ECU only (USD 674 with 8ft harness)
AMP EFI ↗
USUSA Maker in stock
USD 600ECU only; USD 674.99 with harness
DIYAutoTune ↗
USUSA Maker in stock
USD 600ECU only; USD 674.99 with 8ft harness
Exomotive ↗
USUSA in stock
USD 600ECU only; USD 674.99 with harness
PMB Performance ↗
USUSA in stock
USD 600listed as "MicroSquirt Pro Mini" (SKU MS3Pro Mini); ECU only
Stinger Performance ↗
?Location not stated in stock
USD 600drop-shipped from DIY/AMP; ECU + harness adds USD 75; seller country not confirmed
USD 600ECU only
Summit Racing ↗
USUSA in stock
USD 675MS3PRO-MINI-8-PKG (ECU + 8ft harness package)
USD 700with 8ft flying-lead harness
GBP 695≈ US$922MS3 Pro Mini with 8ft loom; + GBP 18 postage; lead time 10-14 days

Prices as shown on each seller's site on , in their own currency, converted at 14 Oct 2026 rates. Shipping, import duty and tax vary. Check with the seller before you buy.

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