SME High Voltage Unlock for BMW G Series: Remove CP & Reset Voltage Counter
Professional Component Protection Removal and Voltage Counter Reset
Tired of critical high-voltage errors shutting down your BMW G Series? Fault codes like 21F4BC, 21F417, and 21F4BB mean your SME module has locked the high-voltage battery due to exceeded voltage counters and Component Protection (CP). Our expert SME High Voltage Unlock service is the permanent, certified solution to erase these faults and restore your BMW to full, safe operation.
What is the SME High Voltage Unlock Service?
This is not a simple code delete. Our service is a manufacturer-level programming routine performed by certified technicians using official BMW engineering protocols. We perform two critical steps remotely:
Remove Component Protection (CP)
We deactivate the security lock that binds the SME to the original VIN, allowing integration with your vehicle.
Reset Voltage Counter
We reset the internal counter that caused the faults, eliminating the root cause of high-voltage errors.
This process utilizes Secure Onboard Communication (SecOc), Secure Coding 2.0, and SFA (Signature Factor Analysis) to ensure a safe and permanent fix.
This Service Permanently Resolves These Fault Codes:
21F4BC
Battery Management: Cell module defect
21F417
High-voltage battery: Cell module malfunction
21F4BB
High-voltage battery monitoring
21F416
Cell voltage monitoring error
21F4BA
Battery management system fault
21F415
High-voltage system malfunction
21F4B9
Battery cell balancing error
21F414
High-voltage contactor fault
21F4B8
Battery temperature monitoring
21F413
High-voltage insulation fault
What You’ll Need for This Remote Service:
Windows PC
A Windows PC with a reliable internet connection for remote programming.
ICOM or ENET Cable
An ICOM interface or a stable ENET Cable for vehicle communication.
Anydesk Software
Anydesk installed for our secure remote connection during the unlock process.
What You Get After the Unlock:
Fully Unlocked SME
A fully unlocked SME and HV battery module, successfully coded to your vehicle.
Error Elimination
The complete elimination of all CP and voltage counter-related errors.
Cleared Fault Memory
A cleared fault memory and a ready-to-drive vehicle with full functionality.
Permanent Solution
A permanent, certified solution performed by BMW coding experts.
How the Unlock Process Works
Initial Connection
We connect remotely to your setup with ICOM/ENET cable and Anydesk installed.
CP Removal
We remove Component Protection using Secure Coding 2.0 and SFA protocols.
Voltage Counter Reset
We reset the voltage counter and clear all related fault codes from the system.
Testing & Verification
We test the high-voltage system and verify all functions are restored.
Frequently Asked Questions
What causes SME high-voltage errors?
These errors occur when the SME module’s voltage counter exceeds limits or Component Protection is active, typically after battery replacement or module changes in BMW G Series vehicles.
Is this service safe for my vehicle?
Yes, this is a manufacturer-level procedure performed by certified technicians using official BMW protocols. It’s the safest method to resolve these critical errors.
How long does the unlock process take?
The complete SME High Voltage Unlock process takes approximately 5 hours due to the complex nature of high-voltage system programming.
What vehicles is this compatible with?
This service is specifically designed for BMW G Series vehicles with high-voltage battery systems, including hybrid and electric models.
Do I need special equipment?
Yes, you need an ICOM or ENET cable, Windows PC with internet, and Anydesk installed for remote access to your vehicle.
Is this a permanent fix?
Yes, this is a permanent solution that removes Component Protection and resets voltage counters at the module level, preventing recurrence of these specific errors.
What if I have other high-voltage errors?
This service addresses the most common SME-related fault codes. Contact us to discuss if your specific error codes can be resolved with this service.
Can I drive my vehicle after the unlock?
Yes, once the unlock is complete and all fault codes are cleared, your vehicle will be ready to drive with full high-voltage system functionality restored.
Book Your Service Now & Get Back on the Road!
The entire process takes approximately 5 hours. Stop searching for fixes and choose the definitive solution.
Get your BMW back to full, safe operation with our professional SME High Voltage Unlock service!
David Kim –
Absolutely brilliant service! SME removed the CP (Component Protection) and reset the high voltage counter on my G26 i4 after a battery module replacement. The process was flawless and my car’s HV system is now functioning perfectly. Their knowledge of BMW’s high voltage systems is exceptional.
Amanda Foster –
Outstanding expertise with BMW high voltage systems! They successfully unlocked my G08 iX3’s HV battery and reset the voltage counter after a controller replacement. The service was professional, and they explained the entire CP removal process clearly. Highly recommended for any BMW EV coding needs.
Marcus Weber –
Professional service for my G20 330e. Needed CP removal after replacing the high voltage charging module. The team knew exactly what they were doing with the BMW systems. Took about 2 hours and everything works perfectly now. One star off only because the appointment availability was limited.
Thomas Richter –
Good technical service for my G30 530e. They handled the CP removal competently after I replaced the DC-DC converter. The voltage counter reset was completed successfully. The only minor issue was communication during the process, but the actual technical work was top-notch.
Malek –
Bmw IX EV 2023 Done