12 51 100 Replacing wiring harness section for ignition coil (S54)

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Turn off ignition.

Remove heater bulkhead.

Lever out expansion rivets.

Remove air duct (1).

Fig 1: Removing Air Duct

Courtesy of BMW OF NORTH AMERICA, INC.

Remove engine vent (1).

Release screws.

Unscrew oil filler cap (2).

Remove ignition coil cover.

Fig 2: Removing Engine Vent And Oil Filler Cap

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on cable strip (2).

Fig 3: Releasing Screws On Cable Strip

Courtesy of BMW OF NORTH AMERICA, INC.

Tilt plug locks (1) of ignition coils upwards.

Fig 4: Tilting Plug Locks Of Ignition Coils

Courtesy of BMW OF NORTH AMERICA, INC.

Detach plugs (1) from ignition coils.

Fig 5: Detaching Plugs From Ignition Coils

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect ground connection (1).

Pull out wiring harness (2) towards top.

Fig 6: Disconnecting Ground Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Detach plug connections of wiring harness section for ignition coils in electronics box. This task is described in the section"Replacing control unit". Refer to 12 14 550 Replacing control unit (M54 / S54) .

Detach strip on left equipment partition wall.

Withdraw wiring harness section for ignition coils from left equipment partition wall and remove.

Installation :

Pay attention to correct installation position of seal from wiring harness section for ignition coils in left equipment partition wall.

NOTE: Interrogate fault memory of DME control unit.

Check stored fault messages.

Rectify faults.

Then clear fault memory.