Brake Collette (TRW) 1-piston brake caliper (model ranges: MINI, 1-Series, 5-Series, 6-Series, Z4)

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

Fig 1: Identifying Brake Piston Contact Surface

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Brake Caliper Contact Surface

Courtesy of BMW OF NORTH AMERICA, INC.

So as not to damage the surface coating, if possible do not mechanically clean  the guide surface (1) for the brake pads on the brake caliper mounting bracket. Clean guide surface (1) with brake cleaner and apply a thin coating of brake pad paste.

Fig 3: Identifying Brake Pads Guide Surface

Courtesy of BMW OF NORTH AMERICA, INC.

Apply a thin coating of brake pad paste to both sides of T-head of brake pad in area (1).

Fig 4: Identifying Brake Pad T-Head

Courtesy of BMW OF NORTH AMERICA, INC.