Battery Management System (BMS) — MG Motor Majestor
Category: Electrical | Severity: high | Cost: ₹15,000–₹70,000
What is Battery Management System (BMS)?
The BMS monitors and controls battery performance, safety, and efficiency.
How Battery Management System (BMS) Works
It tracks voltage, temperature, and current across cells and balances them to prevent damage.
Why is Battery Management System (BMS) Important?
Prevents overcharging, overheating, and ensures battery longevity.
Common Problems
- Sensor failure
- Incorrect readings
- Software glitch
Symptoms
- Battery warning light
- Charging issues
- Reduced range
Causes of Failure
- Electrical faults
- Moisture
- Firmware issues
Impact on Car Performance
Faulty BMS can reduce battery life by up to 50%.
DIY Fix Guide — Step by Step
- Scan with OBD tool
- Check wiring connections
- Reset ECU
- Update firmware if available
Maintenance Tips
- Keep software updated
- Avoid water exposure
- Regular diagnostics
Replacement Cost in India
Estimated range: ₹15,000 – ₹70,000
Where to Buy Online
When to Replace Battery Management System (BMS)
When diagnostics show persistent faults or charging irregularities.