BMW 7 Series: Ignition Wires, Spark Plugs
REPLACING ALL SPARK PLUGS (N54, N63, N74)
Necessary preliminary tasks
- Switch off ignition.
- Remove IGNITION COILS.
IMPORTANT: Wear safety goggles.
Oil and dirt particles may get into your eyes!
Clean spark plug slot with compressed air.
Unscrew spark plugs with special tool 12 1 220 and extension with min. 8º bend.
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Fig. 14: Unscrewing Spark Plugs With Special Tool (12 1 220)
Attach new spark plug (1) to special tool 12 1 230.
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Fig. 15: Attaching Spark Plug To Special Tool (12 1 230)
Screw spark plug with special tool 12 1 230 hand-tight into cylinder head
plug thread as far as it will go.
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Fig. 16: Screwing Spark Plug With Special Tool (12 1 230)
Installation note:
Tighten spark plugs with torque wrench, special tool 12 1 220 and extension
with min. 8º bend.
Observe tightening torque.
Tightening torque 12 12 2AZ.
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Fig. 17: Tightening Spark Plugs With Torque Wrench, Special Tool (12 1 220)
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NOTES ON CHECKING IGNITION SYSTEM
Troubleshooting
Fault in fuel injection system
Spark plug faults
Ignition coil faults
Further fault patterns with evaluation
Additional fault notes for troubles
Switch off ignition.
Connect MoDiC or DIS/GT1 Tester.
Switch on ignition.
Select "Coding" program.
For subsequent procedure, follow instructions in MoDiC or DIS/GT1 Tester.
Carry out adjustment of
SEE MORE:
These services are offered to customers under the generic term "BMW Assist".
From the customer's point of view, "BMW Assist" is a convenient service
guaranteeing more safety, more
mobility and comprehensive information.
In an emergency or a breakdown, "BMW Assist" helps save crucial time in might
Signal tones
General information
An intermittent tone indicates when the vehicle
is approaching an object. E.g., when an object is
detected to the left rear of the vehicle, a signal
tone sounds from the left rear speaker.
The shorter the distance to the object, the
shorter the intervals.
When the