KESS3 Upgrade 3.50: What Is the Bosch MDG1 ECU Unlock Module?

Short answer: Alientech has introduced a new hardware accessory for KESS3 called the KESS3 Unlock Module. It opens locked Bosch MDG1 family ECUs directly in the workshop and provides BOOT-mode programming access.

What Does It Do?

• Independently unlocks protected Bosch MDG1 family ECUs in the workshop
• Provides BOOT-mode access with full memory read/write
• Allows a full backup before any operation
• Offers broad multi-brand vehicle coverage (30+ brands)

Which ECUs Are Covered?

The module supports the following Bosch MDG1 family ECU types:

Which Vehicles Are Covered?

The module covers 30+ brands from model year 2021 onward: Audi, Bentley, Citroën, Fiat, Ford, Hyundai, Iveco, Kia, Land Rover, Opel, Peugeot, Porsche, Seat, Skoda, Toyota, Volkswagen and more — from commercial vehicles to SUVs, diesel and petrol. We recommend confirming the exact ECU type via VIN.

How the Workflow Works

1. Step 1 — unlock with the module: The KESS3 Unlock Module opens the ECU's protection in the workshop without removal.
2. Step 2 — full BOOT-mode access: The ECU is put into BOOT mode, its memory is fully read and backed up.
3. Step 3 — read/write: Original file reading, chip tuning writes and required service operations are performed safely with BOOT access.

Why It Matters

The Bosch MDG1 family is a widely used protected ECU platform across a very broad range of brands. This module lets shops access ECUs that were previously complex or impossible to reach, using a standard accessory with full-backup safety.

Required Activation

KESS3 requires CAR BENCH/BOOT activation with an active subscription.

Frequently Asked Questions

Which device does this module work with?

It's a hardware accessory used together with Alientech KESS3.

Which ECUs does it support?

Bosch MDG1 family types: MD1CS003, MD1CS069, MD1CP007, MD1CS012, MG1CS042, MD1CS004 (HW80), MG1CS031, MD1CP006, MD1CS005 and MG1CS002.

What license do I need?

CAR BENCH/BOOT activation with an active subscription. Contact us to check your current license.