BMW 3 Owners & Service Manuals

BMW 3: Repair

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 Safe working practices for working on a high-voltage system

The following description of the repair of the high-voltage components is only a general list of the content and the procedure. In general, only the specifications and instructions in the current va

 Procedure after an accident

The safety concept of the high-voltage system ensures that, even during or after an accident, there is no danger to the customer, the rescue services or the service employee. The high-voltage system

 Designation and identification

Designation of electrical machines The electrical machine designation is used in the technical documentation for clear identification of the electrical machine. However, the identification of the ele

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 Antifreeze and corrosion inhibitor

The cooling system of the G20 PHEV is filled with the new antifreeze and corrosion inhibitor Frostox HT-12. The new antifreeze and corrosion inhibitor increases the long-term stability and corrosion protection of the components. It replaces the well-known antifreeze and corrosion inhibitor Glysan

 Equipotential bonding

The low-resistance connection between the housing of the high-voltage battery unit and ground is a crucial prerequisite for the fault-free function of the integrated isolation monitoring. This is why it is important to observe the correct tightening torque for all assembly screws. It is also impo

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