changing a 12V battery requires pairing it with the car
Yes, replacing a 12V battery in a BMW with a new one requires that it be 'registered' with the car for best battery life and to avoid electrical issues. If you disconnect and reconnect the existing battery, however, it does not need to be re-registered, the existing registration info is recorded/stored/held in a solid-state memory chip, similar to what is in a thumb drive.
During the BMW battery registration process, the following happens:
- Battery capacity is set to 80%
- Current Odometer reading is stored
- Stored battery statistics such as: current, voltage, battery charge level, are deleted.
- Stored temperature statistics are deleted
The BMW battery management software uses this stored data, and data it collects, to set and adjust optimum charging levels for the battery over time.
2015 i3 Rex, Capparis White, Tera World, Technology & Driving Assistant, Parking Assistant, Harman Kardon Audio System, 19 inch 427 wheels, EVoInnovate EVSE