Tool

Mazda Denso Gen3 (SH7254x): Live via 100% OBD!

Mazda Denso Gen3 (SH7254x): Live via 100% OBD!

New AT Protocol!

Dear Users,

An essential new update for fans of the Japanese brand has arrived on your AutoTuner Tool! We are proud to announce official support for the Denso Gen3 ECUs (SH72543 and SH72546 microcontrollers).

This protocol opens the doors to Mazda's famous Skyactiv-G (Petrol) and Skyactiv-D (Diesel) engine technology. Whether you want to spice up the legendary MX5, give more torque to the CX SUV lineup, or optimize fuel consumption on their sedans, you now have the perfect solution.

⚡ Method: 100% OBD(Normal Read - NR) Leave your removal tools in the drawer! You can now read and write these ECUs directly through the vehicle's diagnostic port. A massive boost in time-saving and efficiency for your workshop.

Supported Global Vehicle Highlights:

  • Petrol Engines (1.5 & 2.0 Skyactiv-G): Mazda 3, Mazda 6, CX-3, CX-5, and MX5.
  • Diesel Engines (1.5 & 2.2 Skyactiv-D): Mazda 2, Mazda 3, Mazda 6, CX-3, and CX-5.

Update your tool today and unleash the true potential of Mazda's Jinba Ittai (the oneness between car and driver)!

The AT Team

Key Features

  • Type: Engine Control Unit (ECU) ⚙️
  • Mode: OBD NR 🔌
  • Readout: Calibration 🧩
  • MCUs: SH72543 & SH72546 🖥️
  • Read time: from 2 to 4 min ⏱️
  • Write time: from 2 to 4 min ⏱️
  • Checksums correction ✅

US Compatibility List*

🚗 2.0L Skyactive-G

  • 2014-2018 3
  • 2016-2019 CX-3
  • 2013-2016 CX-5
  • 2016-2018 MX-5 Miata

🚗 2.2T Skyactive-D

  • 2019 CX-5

*The list may evolve over time.

Blog posts

View all
ToolScania Series S & R 24v OBD Flashing Now on the Tool (Continental EMS10 CEM1)

Scania Series S & R 24v OBD Flashing Now on the Tool (Continental EMS10 CEM1)

Dear Users, Our heavy-duty vehicle software coverage reaches a new milestone! We are thrilled to announce official support for the Continental EMS10 (CEM1) ECU via 100% OBD Normal Read (NR) in BETA...

ToolThe State of Modern Tuning Podcast with The Drive.

The State of Modern Tuning Podcast with The Drive.

Modern tuning is getting harder. Tuning strategies are becoming more complex, but an even bigger challenge is simply gaining read and write access to the ECU. I recently sat down with The Drive to ...

ToolNew Heavy-Duty OBD Support: Scania-Powered Doosan/Develon & Industrial Equipment (EMS S6/S8)

New Heavy-Duty OBD Support: Scania-Powered Doosan/Develon & Industrial Equipment (EMS S6/S8)

Dear Users, A major software release targeting heavy transport, agricultural, and construction equipment has landed on your equipment! Motorola EMS S6 and Continental EMS S8 (EMD1) ECUs are now sup...

Want to know more?

Discover our story

About AutoTuner