12 14 550 

Follow instructions for removing and installing electronic control units.
Interrogate fault memory of DME control unit.
Switch off ignition.

Replacing control unit DME on engine BMW S62

Release retaining clips (1).

Caution!

The air duct can brake at the firewall if not carefully removed and installed.

Carefully twist air duct (2) upwards until it is no longer locked in firewall. Pull air duct (2) forwards and remove towards top.

Replacing control unit DME on engine BMW S62

Open locking bracket (1). Open cover of microfilter housing (2) and unhook from hinges.
Open retaining clip (3).
Pull microfilter housing to right and lift out.

Installation:

Hook cover of filter housing into hinges in correct position. Incorrect installation leads to sealing problems.

Replacing control unit DME on engine BMW S62

Release screws (1).

Tightening torque, 12 90 4AZ:

Type Thread Tightening specification Torque
1AZ Assembly of upper and lower sections
E32 / E34 / E36 5 Nm
2AZ Center section to body
E32 / E34 3 Nm
3AZ Control unit holder in E box
E36 5 Nm
4AZ Control unit box cover
E38 / E39 / E52 4 Nm
E46 6 Nm
E53 / E36/7 / E54 3 Nm
5AZ Electronics box to firewall
E65 Plastic screw 6 Nm

Remove cover (2) from electronics box.

Replacing control unit DME on engine BMW S62

From 10/2000: Note:

For purposes of clarity, the locking tabs (1) are shown with the cover opened.

After releasing screws, unlock both locking tabs (1) and remove cover.

Replacing control unit DME on engine BMW S62

Disconnect plug connections (1).
Release control unit of Digital Motor Electronics (2) from retaining clips (3) and pull out.

Note:

Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.

Then clear fault memory.