00 00... Checking water drain under brake booster for contamination, cleaning if necessary

Remove microfilter housing (1) and air duct (2).

Fig 1: Identifying Microfilter Housing And Air Duct

Courtesy of BMW OF NORTH AMERICA, INC.

Check water drain channel (1) under brake booster for contamination, clean if necessary.

Fig 2: Locating Water Drain Channel Under Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.