84 11 660 Removing and installing/replacing Telematic Control Unit (TCU) (SA633/SA639)

Necessary preliminary tasks: 

• Clamp off BATTERY NEGATIVE LEAD
• Remove LEFT LUGGAGE COMPARTMENT WHEEL ARCH PANEL

Unscrew nuts (1).

Release screw (2).

Remove TCU holder (3) in direction of arrow.

Fig 1: Removing TCU Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug connections (1) and disconnect.

Unfasten aerial plug (2) and disconnect.

Release all nuts.

Remove TCU (3) from holder (4).

Installation: 

Observe color coding of aerial plugs (2).

Fig 2: Identifying Plug Connections, Aerial Plug With TCU And Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

• Carry out VEHICLE PROGRAMMING/ENCODING

For vehicles with Teleservices optional equipment: 

• Update services via menu in the central information display.