{"id":18211,"date":"2026-08-10T09:50:05","date_gmt":"2026-08-10T09:50:05","guid":{"rendered":"https:\/\/launch431.eu\/?post_type=product&p=18211"},"modified":"2026-08-12T18:00:37","modified_gmt":"2026-08-12T18:00:37","slug":"launch-x431-mcu3-adapter-mb-all-keys-lost-ecu-tcu-reading-work-with-x-prog3-giii","status":"publish","type":"product","link":"https:\/\/launch431.eu\/fr\/launch-x431-mcu3-adapter-mb-all-keys-lost-ecu-tcu-reading-work-with-x-prog3-giii\/","title":{"rendered":"Launch X431 MCU3 Adapter for Mercedes-Benz All Keys Lost and ECU TCU Reading work with X-PROG3 GIII"},"content":{"rendered":"
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Launch X431 MCU3 Adapter for X-PROG3 \/ GIII \u2013 Mercedes-Benz All Keys Lost, ECU\/TCU Reading & Advanced BENCH Programming Expansion<\/h4> \n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The\u00a0Launch X431 MCU3 Adapter<\/strong>\u00a0is a professional programming expansion accessory designed specifically for the\u00a0Launch X-PROG3 \/ GIII Programmer<\/strong>.<\/p>

It expands the X-PROG3 platform with additional support for\u00a0newer ECU and TCU data reading, BENCH-mode programming, module replacement, immobiliser operations and selected advanced key-programming procedures<\/strong>.<\/p>

The MCU3 is particularly suitable for\u00a0automotive locksmiths, ECU specialists and advanced diagnostic workshops<\/strong>\u00a0that already use X-PROG3 and require additional programming access to modern engine, transmission and immobiliser control modules.<\/p>

\u2b50 Key Features<\/h2>

  • Designed specifically for\u00a0Launch X-PROG3 \/ GIII<\/strong><\/p><\/li>

  • Expands\u00a0ECU & TCU programming capability<\/strong><\/p><\/li>

  • Supports selected\u00a0Mercedes-Benz All Keys Lost<\/strong>\u00a0procedures<\/p><\/li>

  • Newer ECU \/ TCU data reading<\/p><\/li>

  • BENCH-mode programming<\/strong><\/p><\/li>

  • ECU & TCU replacement workflows<\/p><\/li>

  • Supported ECU \/ TCU cloning operations<\/p><\/li>

  • Module reset \/ virginisation<\/p><\/li>

  • Advanced immobiliser functions<\/p><\/li>

  • BMW\u00a0CAS1 \/ CAS2 \/ CAS3 \/ CAS3+ \/ CAS4 \/ CAS4+<\/strong><\/p><\/li>

  • BMW\u00a0MSV90 ECU<\/strong>\u00a0replacement \/ cloning<\/p><\/li>

  • BMW\u00a08HP \/ EGS<\/strong>\u00a0functions<\/p><\/li>

  • Mercedes-Benz\u00a0VGS-NAG2 \/ VGS2-NAG2 \/ VGS3-NAG2<\/strong><\/p><\/li>

  • VW \/ Audi\u00a0MQB gearbox replacement<\/strong><\/p><\/li>

  • VW \/ Audi\u00a0MED17 \/ EDC17<\/strong>\u00a0data reading<\/p><\/li>

  • Porsche key-programming applications<\/p><\/li>

  • Peugeot key-programming applications<\/p><\/li>

  • PowerShift TCU cloning \/ virginisation<\/p><\/li>

  • Nissan ECU \/ TCM functions<\/p><\/li>

  • Compact expansion for existing X-PROG3 users<\/p><\/li><\/ul>

    \ud83d\udd11 Immobiliser & Key Programming<\/h2>
    Mercedes-Benz<\/strong><\/th>BMW<\/strong><\/th>Additional Applications<\/strong><\/th><\/tr><\/thead>
    All Keys Lost*<\/td>CAS1 Key Programming<\/td>Porsche Key Programming*<\/td><\/tr>
    Add Key*<\/td>CAS2 Key Programming<\/td>Peugeot Key Programming*<\/td><\/tr>
    Immobiliser Data Reading<\/td>CAS3 \/ CAS3+<\/td>Key Data Processing*<\/td><\/tr>
    EIS \/ EZS Operations*<\/td>CAS4 \/ CAS4+<\/td>Immobiliser Data Reading*<\/td><\/tr>
    Key Data Acquisition<\/td>Add Key \/ AKL*<\/td>Module Replacement*<\/td><\/tr>
    Password-Related Data*<\/td>CAS Module Replacement*<\/td>Manufacturer Procedures*<\/td><\/tr><\/tbody><\/table>
    \u00a0<\/div><\/div><\/div><\/div>

    *Exact support depends on the vehicle, immobiliser generation, module and current Launch software.<\/p>

    The MCU3 should\u00a0not be considered a universal All Keys Lost solution<\/strong>\u00a0for every supported manufacturer or model.<\/p>

    \u2699\ufe0f ECU & TCU Programming Functions<\/h2>
    Data Operations<\/strong><\/th>Replacement & Cloning<\/strong><\/th>BENCH Operations<\/strong><\/th><\/tr><\/thead>
    ECU Identification<\/td>ECU Replacement*<\/td>BENCH-Mode Programming*<\/td><\/tr>
    ECU Data Reading<\/td>TCU Replacement*<\/td>Direct Module Connection<\/td><\/tr>
    TCU \/ TCM Data Reading<\/td>ECU Cloning*<\/td>ECU \/ TCU Data Reading<\/td><\/tr>
    Immobiliser Data Reading<\/td>TCU Cloning*<\/td>Module Backup<\/td><\/tr>
    Control-Unit Backup<\/td>Module Virginisation*<\/td>Programming Workflows*<\/td><\/tr>
    Original Data Backup<\/td>Replacement Preparation<\/td>Data Transfer*<\/td><\/tr><\/tbody><\/table>
    \u00a0<\/div><\/div><\/div><\/div>

    *Supported applications only. Exact functionality depends on ECU\/TCU hardware and software.<\/p>

    \ud83d\udd0c BENCH Mode Programming<\/h2>

    The MCU3 supports\u00a0BENCH-mode ECU and TCU operations<\/strong>, allowing compatible control units to be connected directly to the X-PROG3 programming system outside the vehicle.<\/p>

    Typical workflow:<\/p>

    1. Identify the\u00a0ECU \/ TCU module<\/strong>.<\/p><\/li>

    2. Select the corresponding function in Launch software.<\/p><\/li>

    3. Connect\u00a0X-PROG3 and MCU3<\/strong>\u00a0according to the displayed wiring diagram.<\/p><\/li>

    4. Connect the required stable power supply.<\/p><\/li>

    5. Read the original control-unit data.<\/p><\/li>

    6. Save a backup.<\/p><\/li>

    7. Perform the supported programming, replacement or data-transfer procedure.<\/p><\/li><\/ol>

      Always follow the\u00a0Launch software connection diagram<\/strong>\u00a0for the exact control module.<\/p>

      \ud83d\ude98 Advanced Vehicle Applications<\/h2>
      Mercedes-Benz<\/strong><\/th>BMW<\/strong><\/th>VW \/ Audi<\/strong><\/th><\/tr><\/thead>
      All Keys Lost*<\/td>CAS1\u2013CAS4+ Functions*<\/td>MQB Gearbox Replacement*<\/td><\/tr>
      W164 Key Programming*<\/td>MSV90 ECU Replacement*<\/td>MED17 Data Reading*<\/td><\/tr>
      VGS-NAG2<\/td>MSV90 Cloning*<\/td>EDC17 Data Reading*<\/td><\/tr>
      VGS2-NAG2<\/td>8HP \/ EGS Functions*<\/td>5th-Gen Engine Data*<\/td><\/tr>
      VGS3-NAG2<\/td>E \/ F \/ G Chassis Functions*<\/td>4th-Gen Instrument Replacement*<\/td><\/tr>
      TCU Data Reading<\/td>CAS Module Replacement*<\/td>MED17.5.22 Replacement*<\/td><\/tr>
      Module Virginisation*<\/td>ECU \/ TCU Operations*<\/td>Programming \/ Coding Workflows*<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *Application and software dependent.<\/p>

      \ud83d\udd35 BMW Programming Functions<\/h2>
      CAS \/ Immobiliser<\/strong><\/th>Engine ECU<\/strong><\/th>Transmission<\/strong><\/th><\/tr><\/thead>
      CAS1<\/td>Continental MSV90<\/td>ZF 8HP<\/td><\/tr>
      CAS2<\/td>ECU Data Reading<\/td>EGS Reset Functions*<\/td><\/tr>
      CAS3<\/td>ECU Replacement*<\/td>E-Chassis Functions*<\/td><\/tr>
      CAS3+<\/td>ECU Cloning*<\/td>F-Chassis Functions*<\/td><\/tr>
      CAS4<\/td>Data Backup<\/td>G-Chassis Functions*<\/td><\/tr>
      CAS4+<\/td>Replacement Preparation<\/td>TCU Operations*<\/td><\/tr>
      Add Key \/ AKL*<\/td>Data Transfer*<\/td>Module Preparation*<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      BMW compatibility should always be confirmed according to the\u00a0exact chassis, module and software version<\/strong>.<\/p>

      \u2699\ufe0f Mercedes-Benz VGS Functions<\/h2>
      Modules pris en charge<\/strong><\/th>Data Operations<\/strong><\/th>Replacement Functions<\/strong><\/th><\/tr><\/thead>
      VGS-NAG2<\/td>TCU Data Reading<\/td>TCU Replacement*<\/td><\/tr>
      VGS2-NAG2<\/td>Module Information<\/td>Module Reset*<\/td><\/tr>
      VGS3-NAG2<\/td>Data Backup<\/td>Virginisation*<\/td><\/tr>
      Supported VGS Modules<\/td>Data Handling<\/td>Replacement Preparation<\/td><\/tr>
      Software Dependent<\/td>Programming Operations*<\/td>Module Matching*<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *Exact functions depend on the VGS generation and current Launch software.<\/p>

      \ud83d\ude97 VW \/ Audi Applications<\/h2>
      MQB & Transmission<\/strong><\/th>Engine ECU<\/strong><\/th>Immobiliser \/ Instrument<\/strong><\/th><\/tr><\/thead>
      MQB Gearbox Replacement*<\/td>MED17 Data Reading*<\/td>4th-Gen Instrument Replacement*<\/td><\/tr>
      Original TCU Data<\/td>EDC17 Data Reading*<\/td>Immobiliser Data Operations*<\/td><\/tr>
      Replacement Preparation<\/td>MED17.5.22 Replacement*<\/td>Module Data Reading*<\/td><\/tr>
      Matching Data Handling*<\/td>5th-Gen Engine Data*<\/td>Replacement Procedures*<\/td><\/tr>
      Programming Functions*<\/td>ECU Backup*<\/td>Software-Dependent Functions<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *Exact support depends on the vehicle and control-unit generation.<\/p>

      \ud83d\udd04 Additional Programming Applications<\/h2>
      Porsche \/ Peugeot<\/strong><\/th>PowerShift \/ Nissan<\/strong><\/th>Additional Brands<\/strong><\/th><\/tr><\/thead>
      Porsche Cayenne 2011\u20132017*<\/td>PowerShift TCU Reading*<\/td>General Motors*<\/td><\/tr>
      Add Key*<\/td>TCU Cloning*<\/td>Ford*<\/td><\/tr>
      All Keys Lost*<\/td>TCU Virginisation*<\/td>Chrysler \/ FCA*<\/td><\/tr>
      Peugeot Key Programming*<\/td>Nissan ECU Functions*<\/td>Manufacturer Functions*<\/td><\/tr>
      Immobiliser Operations*<\/td>Nissan TCM Conversion*<\/td>Software Dependent<\/td><\/tr>
      Key Data Functions*<\/td>ECU Virginisation*<\/td>Module Dependent<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *Supported applications only.<\/p>

      \ud83d\udcf1 Compatible Launch X431 Platforms<\/h2>
      X431 PRO Series<\/strong><\/th>X431 PAD Series<\/strong><\/th>Additional Platforms<\/strong><\/th><\/tr><\/thead>
      X431 PRO V4.0<\/td>X431 PAD III V2.0<\/td>X431 V<\/td><\/tr>
      X431 PRO3 V4.0<\/td>X431 PAD V<\/td>X431 V+<\/td><\/tr>
      X431 PRO5<\/td>X431 PAD VII<\/td>X431 PRO3S+<\/td><\/tr>
      X-PROG3 Compatible*<\/td>X-PROG3 Compatible*<\/td>X-PROG3 Compatible*<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *The tablet must support the required\u00a0X-PROG3 software and programming environment<\/strong>.<\/p>

      \ud83d\udd17 Typical Connection Architecture<\/h2>

      Compatible Launch X431 Tablet \u2192 X-PROG3 \/ GIII \u2192 MCU3 Adapter \u2192 ECU \/ TCU \/ Immobiliser Module<\/strong><\/p>

      The exact connection varies according to the control unit.<\/p>

      Always follow the wiring and connection diagram displayed by the\u00a0Launch software<\/strong>\u00a0rather than assuming a generic pinout.<\/p>

      \u2699\ufe0f Sp\u00e9cifications techniques<\/strong><\/h2>
      Product & Hardware<\/strong><\/th>Programming Functions<\/strong><\/th>Compatibilit\u00e9<\/strong><\/th><\/tr><\/thead>
      Product:<\/strong>\u00a0Launch X431 MCU3<\/td>BENCH Mode:<\/strong>\u00a0Supported*<\/td>X-PROG3 \/ GIII:<\/strong>\u00a0Required<\/td><\/tr>
      Type:<\/strong>\u00a0Programming Expansion Adapter<\/td>ECU Reading:<\/strong>\u00a0Supported*<\/td>X431 Tablet:<\/strong>\u00a0Required<\/td><\/tr>
      Application:<\/strong>\u00a0ECU \/ TCU \/ IMMO<\/td>TCU Reading:<\/strong>\u00a0Supported*<\/td>Standalone:<\/strong>\u00a0Non<\/td><\/tr>
      Main Role:<\/strong>\u00a0X-PROG3 Expansion<\/td>ECU Replacement:<\/strong>\u00a0Supported*<\/td>X-PROG3 Included:<\/strong>\u00a0Non<\/td><\/tr>
      Mercedes AKL:<\/strong>\u00a0Supported*<\/td>TCU Replacement:<\/strong>\u00a0Supported*<\/td>Software:<\/strong>\u00a0X-PROG3 \/ Launch<\/td><\/tr>
      BMW CAS:<\/strong>\u00a0Supported*<\/td>Cloning:<\/strong>\u00a0Supported*<\/td>Stable Power:<\/strong>\u00a0Required<\/td><\/tr>
      BMW MSV90:<\/strong>\u00a0Supported*<\/td>Virginisation:<\/strong>\u00a0Supported*<\/td>Module Cables:<\/strong>\u00a0Required<\/td><\/tr>
      BMW 8HP \/ EGS:<\/strong>\u00a0Supported*<\/td>Key Programming:<\/strong>\u00a0Supported*<\/td>Coverage:<\/strong>\u00a0Software Dependent<\/td><\/tr>
      VW\/Audi MQB:<\/strong>\u00a0Supported*<\/td>Data Backup:<\/strong>\u00a0Supported*<\/td>Professional Use:<\/strong>\u00a0Recommended<\/td><\/tr>
      MED17 \/ EDC17:<\/strong>\u00a0Supported*<\/td>IMMO Operations:<\/strong>\u00a0Supported*<\/td>Standalone Operation:<\/strong>\u00a0Non<\/td><\/tr><\/tbody><\/table>
      \u00a0<\/div><\/div><\/div><\/div>

      *Supported applications only.<\/p>

      \ud83d\udce6 Contenu de l\u2019emballage<\/strong><\/h2>