Checking coolant level In event of topping up: checking concentration
WARNING: This page is about a different car, the 2003 BMW X5 and 2002 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Check coolant level in expansion tank. Coolant level must be between Min. and Max. markings.
If necessary, top up coolant to max. fill level.
Check concentration with antifreeze tester (SWZ) in coolant expansion tank.
If necessary, drain differential quantity from radiator drain plug and top up with recommended coolant, refer to SI OPERATING FLUIDS .