Coolant Level Check
WARNING: This page does not describe the selected car, but rather 41 other vehicles, including the 2003 BMW M5, 2003 BMW M3, 2003 BMW 540i, 2003 BMW 530i, and 2003 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
To check coolant level, allow engine to cool down; coolant temperature may not exceed 30°C. If ambient temperature is above 30°C, then allow engine to cool down at least to ambient temperature.
Check coolant level, top up coolant if necessary until float is in line with top edge of expansion tank.
NOTE:
Tank mark indicates the fluid level at approx. 20°C. Use only recommended coolant.