84 10 820 Remove & install (replace) telematics control unit

WARNING: High-voltage system - danger to life!
The following points must be strictly observed prior to starting work:
De-energize the HIGH-VOLTAGE SYSTEM .
Observe SAFETY INFORMATION for handling electric vehicles.

IMPORTANT: Observe the INFORMATION ON PROTECTION FROM ELECTROSTATIC DISCHARGE .

Comply with notes and instructions on HANDLING OPTICAL FIBRE .

Necessary preliminary tasks:

Disconnect BATTERY EARTH LEAD
Remove REAR SEAT

Unlock and disconnect the connector (1).

Unscrew nuts (2).

Fig 1: Identifying Telematics Control Unit Connector And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect the connector (1).

Unscrew nuts (2).

Remove telematics control unit (3) in direction of arrow.

Installation note:

Note color coding of connector.

Fig 2: Removing Telematics Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: When replacing telematics control unit, it should be checked whether the defective telematics control unit has been equipped with an EMERGENCY BATTERY :

if no , then the new part is installed without an emergency battery !
if yes , then the new part should be equipped with new emergency battery (separate purchase order, telematics control unit is delivered without emergency battery!)

Replacement:

Carry out VEHICLE PROGRAMMING/ENCODING .