12 14 550 Replacing control unit (DME): Replacement

IMPORTANT: It is absolutely essential to read out the fault memory with the BMW diagnosis system and to create a fault memory printout.

Switch off ignition.

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Unlocking Electronic Box Locks

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Unlock connector (1) and remove.

Release grommet (2) from electronics box.

Installation note:

Make sure grommet (2) is correctly seated in housing (watertightness).

Unlock control unit (3) and raise slightly.

Fig 2: Identifying Electronics Box Grommet, Control Unit And Connector

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Unlock connectors (1) using slide in direction of arrow and remove.

Remove control unit (2).

Installation note:

Replacement:

Note control unit identification number and encoding.

Fig 3: Removing Control Unit Connectors

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NOTE: Check stored fault messages.
Delete fault memory.