12 13 511 Replacing ignition coils

WARNING: High-voltage system - danger to life
Compliance with the following points is mandatory before beginning work:

De-energize the HIGH-VOLTAGE SYSTEM .
Observe SAFETY INFORMATION for handling electric vehicles.

Necessary preliminary tasks:

Remove INTAKE PLENUM .

IMPORTANT: Ignition coils must not be contaminated by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail!
The silicone tube of the spark plug connector is coated with talc to reduce the pulling forces. The silicone tube must NOT be oiled or greased. This would greatly reduce the durability of the silicone material, which can lead to a malfunction of the ignition coil.

Unlock and pull off connectors (1) on ignition coils.

Fig 1: Identifying Ignition Coils Connectors

Courtesy of BMW OF NORTH AMERICA, INC.

Push special tool 12 3 621 onto ignition coil in direction of arrow.

Fig 2: Pushing Special Tool (12 3 621) Onto Ignition Coil

Courtesy of BMW OF NORTH AMERICA, INC.

Pull out ignition coil (1) with special tool 12 3 621 and remove.

Slowly pull the ignition coil (1) up and out without jerking it.

NOTE: There is a possibility that the silicone tube will tear and therefore be destroyed.

This procedure is applicable to all ignition coils.

Installation note:

Position the ignition coil and gently push it to the limit position, if necessary by twisting it back and forth slightly.

The rubber cap must completely surround the sealing collar of the cylinder head cover.

NOTE: If rubber parts are squashed, the ignition coil can slip out again during engine operation.

Fig 3: Pulling Out Ignition Coil (1) With Special Tool (12 3 621)

Courtesy of BMW OF NORTH AMERICA, INC.

Reconnect connectors (1) to the ignition coils. Make sure the connectors are properly engaged.

Fig 4: Identifying Ignition Coils Connectors

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Assemble engine.