Autel is known to be the best at repairing a Corrupt BMW CAS3++ ISTAP Flash file from a failed OBD2 Key Programming Session.
But can we use VVDI Key tool plus as an alternative way to repair a Corrupt CAS3++?
Here is the clue.
Step-by-Step Recovery Process
1. Connecting the CAS3++ Module
- The CAS3+ adapter is attached to the module using a DB25 cable.
- The tool detects the module and confirms communication by reading the flash chip, indicating the hardware is intact.
2. Reading & Backing Up Data
- The EPROM and flash memory are successfully read and saved.
- The last seven digits of the VIN are manually added to the file for identification.
3. Attempting Flash Repair
- Navigate to Special Functions > Flash Repair (No ESL).
- The tool begins writing a corrected flash file to the module.
- The process completes with a “Write Complete” confirmation, suggesting a successful repair.
Key Observations
1. BMW CAS3++ & DME Compatibility Issues
- The Bosch DME paired with this CAS3++ only provides a 4-digit ISN (instead of the standard 32-digit).
- All-keys-lost (AKL) situations are nearly impossible with this setup unless using high-end tools like Autohex (which claims to convert 4-digit ISN to 32-digit).
2. Why This BMW Model Is Problematic
- Found in V8 models (E60 5 Series, E63 6 Series, E70 X5).
- Most tools fail to extract a usable ISN, making key programming extremely difficult.
3. Alternative Solution
- If the car won’t start, the best workaround is to replace the DME and CAS with a matched set from another donor vehicle.
Conclusion
- The VVDI Key Tool Plus + CAS3+ adapter shows promise in repairing corrupted BMW CAS3++ modules.
- BMW V8 models with Bosch DMEs remain high-risk for locksmiths due to ISN limitations.
- For AKL cases, Autohex may be the only solution, but its effectiveness is unverified.