12 12 011 Replacing all spark plugs (N52K)

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Switch off ignition.
Remove IGNITION COILS .

IMPORTANT: Wear safety goggles.
Oil and dirt particles may get into your eyes!

Clean spark connector slot with compressed air.

Unscrew spark plugs with special tool 12 1 171 and an extension with a joint.

Installation note:

First, hand-thighten the spark plugs with special tool 12 1 171 and with an extension with a joint into the engine.

Then tighten the spark plugs using a torque wrench, special tool 12 1 171 and an extension with a joint.

Observe tightening torque.

Tightening torque 12 12 2AZ .

Fig 1: Removing Spark Plug Using Special Tool (12 1 171)

Courtesy of BMW OF NORTH AMERICA, INC.