BMW 3 Owners & Service Manuals

BMW 3: 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 Glysantin G48.

Like the G48, the HT-12 contains silicate and forms a silicate passivation layer on metallic component surfaces to prevent corrosion.

Antifreeze and corrosion inhibitors cannot be mixed with each other in any manner. If they are mixed, it may cause the antifreeze and corrosion inhibitor to gel, thus causing damage. The selection of the correct antifreeze and corrosion inhibitor is only possible via the workshop information system using the part number.

Automated coolant bleeding routine

When components have been replaced on the low-temperature coolant circuit or the cooling system has been filled, an automated coolant bleeding routine must be carried out. Otherwise, there is a risk of damage to the components to be cooled.

The actuators in the cooling system are activated during the automated coolant bleeding routine.

The automated coolant bleeding routine is completed after around 10 minutes.

The following prerequisites must be satisfied to be able to carry out an automated coolant bleeding routine on the low-temperature coolant circuit:

  • Charging cable not connected at the high-voltage connection
  • Open hood
  • Check and if necessary correct coolant level in the expansion tank
  • Connect 12 V battery charger to the jump start terminal point and switch on
  • Activate PAD mode
  • Set temperature of the integrated automatic heating/air conditioning system to the highest temperature
  • Select the lowest blower speed.

Proceed as follows to start the automated coolant bleeding routine:

  • Press the accelerator pedal as far as the limit position for at least 10 seconds (do not press the brake pedal while doing so)
  • Release accelerator pedal.

The starting and ending of the automated coolant bleeding routine is displayed in the instrument cluster.

After completing the service function, check and if necessary correct the coolant level in the expansion tank and switch off and disconnect the 12 V battery charger.


     High-voltage Battery Unit


    With the G20 PHEV the already familiar Generation 4.0 high-voltage battery unit with the designation SP41 is used. The lithium-ion battery has the same basic design as the Generation 3.0 SP06 high-

     Technical data

    The high-voltage battery unit of the G20 PHEV is manufactured by BMW itself in Dingolfing /Germany. The cells of the high-voltage battery unit are supplied by the Korean company Samsung SDI. T


     General information

    When the vehicle is locked, the vehicle alarm system reacts to the following changes: Opening a door, the hood or the trunk lid. Movements in the car's interior. Changes in the vehicle tilt, for instance, during attempts at stealing a wheel or when towing the vehicle. Disconnected battery vol

     Standard charging cable

    The standard charging cable is designed for mobile use. All protection and communication devices of the standard charging cable are integrated in the so-called "in-cable control box". The volume and weight of this solution is low and the charging cable can be easily transported in the vehicle. I

    © 2019-2024 Copyright