OBDSTAR C4-09 (MB91F526) Adapter Kit

Magneti Marelli MB91F526 BCM Adapter Kit – FLASH / DFLASH Read & Write + Immobilizer Data Decryption

Product Description

The OBDSTAR C4-09 (MB91F526) Adapter Kit is a specialized module designed for reading and writing FLASH and DFLASH memory, as well as immobilizer data decryption, on BCM (Body Control Module) units equipped with the MB91F526 microcontroller.

This adapter is intended for professional automotive locksmiths and advanced diagnostic specialists working on FCA / Stellantis / Ferrari / Jeep / Mazda vehicles fitted with Magneti Marelli or Denso BCMs using the MB91F526 processor.

⚠ Important:
The C4-09 must be used with the OBDSTAR MP001 multifunction programmer (mandatory).

Main Functions

✔ FLASH Read

Complete extraction of program memory.

✔ DFLASH Read

Reading of internal data memory.

✔ FLASH / DFLASH Write

Secure rewriting after repair, cloning, or data restoration.

✔ Immobilizer Data Decryption

Processing of IMMO data for key programming operations.

Supported Vehicles – Magneti Marelli MB91F526 BCM

ALFA ROMEO

• Giulia – Magneti Marelli MB91F526 BCM

• Stelvio – Magneti Marelli MB91F526 BCM

FERRARI

• 488 GTB – Magneti Marelli MB91F526 BCM

• Portofino – Magneti Marelli MB91F526 BCM

FIAT

• Argo (Brazil) – Magneti Marelli MB91F526 BCM

• Cronos (Brazil) – Magneti Marelli MB91F526 BCM

• Ducato (2023 →) – Magneti Marelli MB91F526 BCM

• Fastback (Brazil) – Magneti Marelli MB91F526 BCM

• Pulse (Brazil) – Magneti Marelli MB91F526 BCM

• Toro (Brazil) – Magneti Marelli MB91F526 BCM

• Rampage (Brazil) – Magneti Marelli MB91F526 BCM

JEEP

• Renegade (Brazil) – Magneti Marelli MB91F526 BCM

Additional Compatibility

MAZDA

• Mazda 3 – DENSO MB91F526 (BDMC mode)
  Function: FLASH Read / Write

Compatible Tools

The C4-09 adapter works with:

• OBDSTAR KeyMaster G3

• OBDSTAR DC706

• OBDSTAR MP001 multifunction programmer (required)

Technical Specifications

• Product Type: BCM adapter kit

• Target Microcontroller: MB91F526

• BCM Manufacturers: Magneti Marelli / Denso

• Working Methods: Direct board connection / BDMC mode depending on model

• Applications: Key programming, IMMO data recovery, BCM repair

Professional Applications

The C4-09 enables:

• All keys lost procedures

• BCM repair and recovery

• Module cloning

• Preventive immobilizer data backup

• Intervention on recent FCA / Ferrari platforms

As BCM architectures continue to integrate stronger encryption layers, mastering MB91F526 microcontroller processing represents a strategic advantage for automotive locksmiths and IMMO specialists working on modern Stellantis-based systems.

Package Contents

• OBDSTAR C4-09 (MB91F526) adapter

• Dedicated connection cables

• Specific BCM connectors

(MP001 programmer not included)

Why Choose the C4-09?

• Dedicated solution for MB91F526 BCM units

• Compatible with modern Stellantis platforms

• Native integration within the OBDSTAR ecosystem

• Designed for secure professional operations