DCS CONTROL MODULE (325xi & 330xi): Removal

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2004 BMW M3, 2004 BMW 330xi, 2004 BMW 330i, 2004 BMW 330Ci, and 2004 BMW 325xi. However, it is still accessible from the selected car via links, so may be relevant.

Read out control module fault memory and, if necessary, print out diagnostic trouble code.
Unfasten plug connection lock (1) in direction (2). Detach plug connection (1) in direction (3) vertically towards top. See Fig 1.
Release screws (1) and detach control module (2) from hydraulic unit. See Fig 2.
Check sealing surface (1) for damage. Clean sealing surface (1). Do not use any sharp-edged tools or aggressive cleaning agents for this purpose. See Fig 3.

Fig 1: Removing Plug Connection (3 Series xi)

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Removing Control Unit From Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Locating Sealing Surface Components

Courtesy of BMW OF NORTH AMERICA, INC.