Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Activating the 48 V electrical system
2023 BMW X6 MSECTION Activating the 48 V electrical system
Precondition
Ignition is switched off.
NOTE:
RISK OF DAMAGE
Damage to the 48-V battery
If a 48-V battery disconnected from the on-board electrical system is activated, the battery electronics are damaged.
Damage to the 48-V battery
If a 48-V battery disconnected from the on-board electrical system is activated, the battery electronics are damaged.
- Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.
- Raise the battery ground cable.
- Remove special tool 2 452 007
.
- Release the negative battery cable of the 48-V battery from the attachment.
- Position the negative battery cable of the 48-V battery on the negative battery terminal.
- Tighten nut (1).TIGHTENING TORQUE SPECIFICATION
Negative battery cable to 48-V battery Nut M8 Tightening torque 19 Nm - Connect the connector of the CAN bus and lock it.
- Clip in clip.
- Activate the 48 V electrical system by closing the hood.
Activation is automatic.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.