CAS4 / CAS4+ (5M48H/1N35H) Editor v1.2


Introducing a specialized free software utility for working with BMW CAS4 and CAS4+ immobilizer systems equipped with 5M48H / 1N35H processors. This tool is engineered to handle both standard and encrypted CAS4 modules, providing powerful decryption and editing capabilities.

Smart Version Detection

The software automatically detects the type of your loaded EEPROM file (32KB), clearly indicating whether it is working with a standard CAS4 or an encrypted CAS4+ crypted version!. This eliminates guesswork and helps you choose the correct function.

Key Features Breakdown

• Advanced ISN Decryption & Editing:
  • For Unencrypted CAS4: Allows for direct and easy changing of the ECU ISN.
  • For Encrypted CAS4+:Provides two methods for decryption before you can change the ISN:
    1. Decrypt with ECU ISN: Uses the known ISN from the engine control unit.
    2. Decrypt with SK PSWD (KEY): Uses the secret key password from a working key.
• Unique Mileage History Feature:
  • Not only can you correct the mileage, but the software also reads and displays a history of previous mileage records stored within the EEPROM dump, a rare and useful feature for vehicle analysis.
• Full Data Editing:
  • Change the long VIN.
  • Edit the EGS ISN for gearbox synchronization.
  • Modify the Remote ID.
  • Change the key operating frequency.
• Comprehensive Info Display & Key Management:
  • View all critical CAS data at a glance: VIN, Key Frequency, EGS ISN, Mileage, Remote ID, and the status of all 10 key slots.
  • Save ECU and CAS Secret Keys (SK) to a text file for your records.
• Automatic Checksum Correction:
  • All checksums are calculated and corrected automatically upon saving the file, ensuring the dump remains valid.

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Hardware & System Information​

Important Module Information:This software is designed exclusively for CAS4/4+ modules with processors 5M48H and 1N35H (MC9S12XEP100). It is not compatible with other CAS versions.

System Requirements:

• Operating System: This software was tested and confirmed to be working on Windows 10 Enterprise LTSC (2019). It is expected to be compatible with other versions of Windows 7, 8, and 10.

Compatible Hardware Programmers:To read the 32KB EEPROM dump from these CAS4/4+ modules, you will need a reliable programmer. Commonly used tools for this processor include:

• VVDI Prog
• XPROG-M
• Orange5
• R270+

Disclaimer​

This is an expert-level tool for professional use. Incorrect use, especially of decryption and editing functions, can damage the CAS module. Always work on a backup of your original file. The user is fully responsible for all actions performed with this software and must comply with all local laws.

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VirusTotal Check: https://www.virustotal.com/gui/file/1114cba14b74274813f0d69a5079cc02c2ffb7c2a29aed9f118b81cc003f4ffc

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