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Home >> BMW >> 1997 >> 750iL >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Engine Electrical System - Repair >> Ignition wires, spark plugs >> 12 12 038 Replacing all right ignition leads (M73)

12 12 038 Replacing all right ignition leads (M73)

Press interlock (2) and remove connector (1).

Fig 1: Removing Connector (M 73)
G03212895

Open clips (1).

Unfasten hose clip (2) from auxiliary hose for air pump. Pull off hose.

Disconnect plug-in connection (3).

Release hose clamp (4), withdraw hose.

Remove upper section of suction filter housing style with mass air flow sensor.

Fig 2: Removing Suction Filter Housing Upper Section With Mass Air Flow Sensor
G03212896

From model year 1998:

Pull air hose (1) off air intake hose (2)

Fig 3: Removing Intake Hose (Model 1998 Onwards)
G03212897

From model year 1998:

Unclip air hoses (1 and 2) from bracket (3).

Fig 4: Removing Air Hose From Bracket (Model 1998 Onwards)
G03212898

Unclip diagnosis connector from bracket.

Fig 5: Removing Diagnosis Connector From Bracket
G03212899

Unfasten screw connection for ignition wiring harness (1) from manifold.

Remove spark-plug connectors.

Fig 6: Releasing Manifold Ignition Wiring Harness Screw Connection (M 73)
G03212900

Unfasten cable tie on protective cap for distributor cap.

Unfasten clips (1 to 3) and remove protective cap for distributor cap.

Fig 7: Removing Distributor Protective Cap
G03212901

Note sequence of ignition leads on the distributor cap and remove the distributor cap.

Installation: 

  1. When fitting ignition leads, note firing order.

Firing order, refer to FIRING ORDER & TIMING MARKS .

Fig 8: Ignition Leads Fitting Instructions
G03212902