12 51 304 Removing and installing/replacing engine wiring harness section, Valvetronic servomotor cylinder 1-4 (N63 B40/44 O 1)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

IMPORTANT: Screw back on all screw points of cable channels without fail! Some screw points are also ground points . If the wiring harnesses are not correctly screwed tight and secured, this may cause DME malfunction and failure!

Necessary preliminary tasks:

Read out the fault memory of the DME control unit.
Switch off ignition.
Remove right THROTTLE BODY .

Fig 1: Overview Of Wiring Harness Section (Valvetronic Servomotor Cylinder 1 To 4)
Courtesy of BMW OF NORTH AMERICA, INC.

Overview of wiring harness section, Valvetronic servomotor cylinder 1-4.

Unlock connector on DME control unit and on Valvetronic servomotor and pull off. Feed out wiring harness and remove.

Release wiring harness if necessary from existing clips and clamps.

Feed out wiring harness and remove.

Installation note:

Check wiring harness installation arrangement.

Check plug connections for correct fit.

Check stored fault message.

Clear diagnostic fault entries from fault memory.