BMW 3 Owners & Service Manuals

BMW 3: Operating principle

If the driver adjusts a desired temperature at the IHKA controls, the IHKA calculates a corresponding nominal temperature and compares it to the actual output temperature of the electrical heating.

There is a coolant temperature sensor at the electrical heating output for this purpose. This way the IHKA control unit can decide whether the heat from the combustion engine is sufficient to heat the passenger compartment or whether the electrical heating should be switched on. If the temperature of the coolant is too low, the electric heating can heat up to a total of 6 stages. The electrical heating is always condition-based thanks to this control operation.


 Low coolant temperature

When the coolant temperature is low, for example after driving off, or in all-electric driving, the electric changeover valve is activated by the Body Domain Controller (BDC). The electrical changeo

 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

 B46TU-B48TU Engines

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 BMW Remote Software Upgrade

Concept Remote Software Upgrade can be used to update the software of the vehicle. Remote Software Upgrade makes new functions, functional enhancements or quality improvements available. General information BMW recommends performing the Remote Software Upgrade as soon as it becomes available. The a

 System limits

Detection range The detection capacity of the system and the automatic braking capacity are limited. Two-wheeled vehicles for instance might not be detected. Deceleration The system does not decelerate in the following situations: For pedestrians or similarly slow-moving road users. For red tr

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