11 53 000 Removing and installing / replacing coolant thermostat (M62): Notes
WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Remove upper section of suction filter housing with mass air flow sensor.
Unscrew and remove splash guard.
Drain off coolant and dispose of correctly.