12 51 100 Replacing wiring harness section for ignition coil (N62)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Follow instructions for disconnecting and connecting battery
Disconnect battery

NOTE: The procedure is identical for both sides. The illustrations depict the left side.

Remove HEATER BULKHEAD . Remove acoustic cover. See CYLINDER HEAD WITH COVER . Remove ignition coil cover. Remove electronics box cover.

Unclip cable duct. Unlock plug connections on ignition coils and disconnect. See Replacing Ignition Coil (N62) . Do not remove ignition coils.

Unlock and detach plug connections on DME control unit. Only plug connections of wiring harness section from ignition coils. Release nuts and remove holder (1).

Fig 1: Removing Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws and remove grounding cable.

Unclip and remove wiring harness.

Fig 2: Removing Wiring Harness

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NOTE: Check stored fault messages.

Now clear the fault memory.