Brake P 4.40 (Brembo) 4-piston fixed caliper brake (model ranges: MINI, 1-Series, 3-Series, 4-Series, 5-Series, 6-Series, 7-Series, 8-Series, X5, RR)

Clean contact surface (1) of brake piston with brake cleaner and apply a thin coating of brake pad paste.

So as not to damage the surface coating, if possible do not mechanically clean  the guide surfaces (2) for the brake pads on the brake caliper mounting bracket. Clean guide surface (2) with brake cleaner and apply a thin coating of brake pad paste.

Clean both inner and outer guide surfaces (2) and apply a thin coating of brake pad paste.

Fig 1: Identifying Guide Surfaces For Brake Pads On Brake Caliper Mounting Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Lightly coat both sides of the contact surface in area (1 and 2) with brake pad paste.

Fig 2: Identifying Brake Pad Paste Application Area On Both Sides Of Contact Surface

Courtesy of BMW OF NORTH AMERICA, INC.

Lightly coat the brake pad contact surface on both sides in area (1) with brake pad paste.

Fig 3: Identifying Paste Application Area On Both Sides Of Brake Pad Contact Surface

Courtesy of BMW OF NORTH AMERICA, INC.