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Frequently asked questions about cars and motorcycles

Radiator Coolant Replacement

Model: BMW Serie 5 E39 - Years 1995-2003
Part: Antifreeze coolant

The engine coolant also serves to heat the cabin: the system consists of a radiator through which the coolant flows, which, once heated, warms the surrounding air that is then sent into the cabin through a fan. When replacing the coolant, which will consist of a mixture of water and the appropriate antifreeze, make sure that no air bubbles form in the system. Once the radiator is filled, start the engine and turn on the cabin heater with the fan and temperature set to maximum to circulate the coolant throughout the system. After the engine has cooled down, open the cap and check the level.

Updated on 17 February 2026 by ScegliAuto

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