Bosch MD1CS004 / MD1CS104

New AT Protocol!

Dear Users,

Tuning options for the VAG group's flagship diesel engines are taking a major leap forward on your AutoTuner Tool!

As you know, our Tool already supported certain variants of the MD1CS004 H80 ECU directly via the diagnostic port (OBD). However, due to continuous factory software updates and sophisticated security patches, a significant number of these ECUs remained completely locked and out of reach for workshops.

Today, we are removing all limitations with our Mail-in Unlock service! This strategic update allows you to open up Bench mode access for these modules. Most importantly, it covers all MD1CS004 variants that were previously unsupported via OBD, while simultaneously adding full support for the brand-new MD1CS104 ECU (up to 2025 models).

🔒 A secure workflow (Mail-in ➡️ Bench):

1. Mail-in Unlock: Send the ECU to our headquarters for a secure hardware unlock by our engineering specialists.

2. Bench: Once returned to your shop, software locks are a thing of the past. You gain unrestricted Bench NR access to read and flash directly on your workbench!

Coverage Highlights (2.0 TDI / 2.0 EcoBlue Engines):

• Audi: A3, A4, A5, A6, A7, Q2, Q3, Q5, SQ5 (30/35/40 TDI variants) — from 2012 to 2025 models.

• Volkswagen: Golf (7, 8 & GTD), Passat, Tiguan, Arteon, Caddy, T-Roc, and the brand-new Tayron (2025).

• Commercial Vehicles: Transporter / Multivan (T6/T7), VW Crafter (2023+), MAN TGE (2023+).

• Cupra, Seat & Skoda: Formentor, Leon, Ateca, Tarraco, Octavia, Superb, Kodiaq, Karoq.

• Ford (Shared platform): Tourneo Connect & Transit Courier (2.0 EcoBlue).

Update your software today and confidently unlock 100% of Europe's most popular diesel segment!

The AT Team

Key Features

• Type: Engine Control Unit (ECU) ⚙️
• Mode: BENCH NR 🔌
• MCU: TC298 / TC389 - HW80 🖥️
• Read time: 2min ⏱️
• Write time: 30sec ⏱️
• Checksums correction ✅
• Backup creation 🔄
• Mail-in Unlock required 📦

Compatibility List*

🚗 Audi Models: A3 (2012 - 2024) / A4 (2008 - 2018) / A5 (2011 - 2024) / A6 (2011 - 2025) / A7 (2018) / Q2 (2016) / Q3 (2011 - 2025) / Q5 (2012 - 2024) / SQ5 (2019)
🔧 Audi Engines: 2.0 TDI / 2.0 TDI CR EU6 / 30 TDI (2.0) / 35 TDI (2.0) / 40 TDI (2.0)

🚗 Cupra Model: Formentor (2020 - 2025)
🔧 Cupra Engine: 2.0 TDI CR EU6

🚗 Ford Models: Tourneo Connect (2021) / Transit Courier (2023)
🔧 Ford Engine: 2.0 EcoBlue

🚗 MAN Model: TGE (2023)
🔧 MAN Engine: 2.0 TDI CR EU6.2

🚗 Seat Models: Alhambra (2015) / Ateca (2016 - 2020) / Leon (2013 - 2020) / Tarraco (2019)
🔧 Seat Engines: 2.0 TDI CR EU6 / 2.0 TDI CR EU6.2

🚗 Skoda Models: Karoq (2017 - 2022) / Kodiaq (2017 - 2023) / Octavia (2013 - 2020) / Superb (2015 - 2023) / Yeti (2008 - 2014)
🔧 Skoda Engines: 2.0 TDI CR EU6 / 2.0 TDI CR EU6.2

🚗 Volkswagen Models: Arteon (2017 - 2020) / Caddy (2015 - 2021) / Coccinelle / Beetle (2011) / Crafter (2023) / Golf (2012 - 2024) / Golf Sportvan (2014) / Jetta (2010 - 2014) / Passat (2015 - 2023) / Passat CC (2013) / Scirocco (2014) / Sharan (2015) / T-Roc (2017) / Tayron (2025) / Tiguan (2016 - 2024) / Touran (2016) / Transporter / Multivan / Caravelle (2015 - 2021)
🔧 Volkswagen Engines: 2.0 TDI CR / 2.0 TDI CR EU6 / 2.0 TDI CR EU6.2 / 2.0 TDI GTD

*The list may evolve over time.