11 37 700 Replacing control unit (Valvetronic)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Switch off ignition.

Follow instructions for disconnecting and connecting battery. Refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

Disconnect battery.

CAUTION: Follow instructions for removing and installing electronic control units. Refer to REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS .

Observe following instructions before replacing control unit:

Program control unit. Refer to 12 14 705 PROGRAMMING CONTROL UNIT (DME / DDE) .

Remove right fresh air duct.

Release screw and remove holder (1).

Release screws and remove cover (2) from control unit box.

NOTE: Release screws on seal (3) only when removing wiring harness.

Fig 1: Releasing Screws And Removing Cover From Control Unit Box

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Installation:

Insert tabs (1) in openings (2) and close cover.

Fig 2: Inserting Tabs In Openings And Closing Cover

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Unlock and detach plug connections on Valvetronic control unit (1).

Remove Valvetronic control unit (1).

Fig 3: Removing Valvetronic Control Unit

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NOTE: Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.