84 11 660 Removing and installing/replacing telematic control unit (TCU) (option SA633/SA638/SA639/SA664)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 BMW 335xi, 2008 BMW 335i, 2008 BMW 328xi, 2008 BMW 328i, and 2007 BMW 335xi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Replacement with option SA638/SA664:

Carry out Vehicle Programming/Coding
If necessary, carry out coupling procedure

Replacement with option SA633/SA639:

Carry out Vehicle Programming/Coding
Via Diagnosis and Information System (DIS):
- Service functions
- Start subsequent assessment

IMPORTANT: Read and comply with Notes On Protection Against Electrostatic Damage (ESD Protection) .

NOTE: Comply with notes and instructions on Handling Optical Waveguides.

Necessary preliminary tasks:

Disconnect Battery Negative Lead
Remove Luggage Compartment Floor Trim

E91 only:

Release clips (1) and remove storage pan (2).

Fold panel (3) upwards.

Fig 1: Identifying Clips, Storage Pan And Panel

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and unclip cable ties (2).

Fig 2: Identifying Cable Ties And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Fig 3: Identifying TCU Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connections of antenna cables (1).

Remove TCU (2).

Installation:

Note colour coding of antenna plugs.

Fig 4: Identifying TCU And Antenna Cables

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement up to build date 03/2007:

NOTE: TCU Everest is replaced from 03/2007 by TCU 1.5.

Unclip cable holder (1) from TCU holder (2).
Connect antenna leads according to new layout (new cable routing as pictured)
Secure cable holder (1) to TCU holder (2) with cable tie

Fig 5: Identifying Cable Holder And TCU Holder
Courtesy of BMW OF NORTH AMERICA, INC.