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.
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HOMESERVICE MANUALSBMW2023X3 SDRIVE30IREPAIR AND DIAGNOSISGENERAL INFORMATIONOEM GENERAL INFORMATIONGENERAL ORPHAN DATA (1 OF 2)ACTIVATING THE 48 V ELECTRICAL SYSTEM
2023 BMW X3 sDrive30i
Activating the 48 V electrical system
2023 BMW X3 sDrive30iSECTION Activating the 48 V electrical system
Prerequisite
Ignition is switched off.
NOTE:
RISK OF DAMAGE
Damage to the 48-V battery
If a 48-V battery that is disconnected from the electrical system is activated, the battery electronics will be damaged.
Damage to the 48-V battery
If a 48-V battery that is disconnected from the electrical system is activated, the battery electronics will be damaged.
- Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.
- Raise the battery ground cable (1).
- Remove special tool 2 452 007
.
- Release the negative battery cable (2) of the 48-V battery from the attachment.
- Position the negative battery cable (2) of the 48-V battery on the negative battery terminal.
- Tighten the nut (1).TIGHTENING TORQUES SPECIFICATION
Negative battery cable to 48-V battery Nut M8 tightening torque
19 Nm - Connect the connector (1) of the CAN bus and lock it.
- Clip in the clip (2).
- Activate the 48 V electrical system by closing the hood.
The activation takes place automatically.
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.