High-voltage traction battery
Stores the energy used to propel an electric or plug-in-hybrid BMW.
Under the floor or in another protected body location, depending on model.
Cells are arranged in a controlled pack with protection, monitoring and thermal management; usable and total capacity differ.
A large rechargeable energy tank.
Range changes or warnings can reflect temperature, usage, software or faults rather than pack failure.
Battery and drive components are assessed with system diagnostics and model-specific warranty and service guidance, not a universal expiry age.
High-voltage work requires trained facilities. A complete pack differs from a serviceable module, sensor or charging-port repair; no numeric quote is asserted.
BMW battery generations differ in cell format, packaging and system architecture.
BMW battery-electric cars such as the i3, i4 and iX, plus plug-in hybrids with a smaller, differently packaged traction battery.