BMW i3 Battery Module Repair
Mobile High-Voltage Battery Specialist | London On-Site Service
Technical Inquiries
07779 836677Direct Roadside Tech
07448 457247Module Replacement
The i3 battery pack consists of 8 Samsung SDI modules. If one cell drops voltage, the whole car stops. We identify the specific faulty module and replace it without needing a full pack replacement.
- Cell Voltage Analysis
- Module Extraction
- Capacity Matching
- BMS Recalibration
HV Isolation Repair
Commonly caused by coolant leaks or cable wear, isolation faults trigger "Drivetrain Malfunction." We perform HV insulation testing to find and fix the leak in the high-voltage circuit.
- Megohmmeter Testing
- HV Cable Repair
- Safety Switch Fix
- SME Logic Resets
Cell Imbalance Fix
Sudden range drops are often due to imbalanced modules. We perform deep-cycle balancing to equalize the pack, restoring lost range and preventing premature drivetrain shutdowns.
- Balancing Software
- SOH Health Reports
- Delta-V Correction
- Pack De-rating Fix
SME Module Coding
The Battery Management Electronics (SME) can fail or lose synchronization. we provide mobile coding and programming for the battery control units to resolve communication errors.
- SME Unit Coding
- Firmware Updates
- Interlock Diagnosis
- Contactor Testing