12 13 Carrying out engine cleaning (N54, N53, N43)
WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 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.
IMPORTANT:
When cleaning the engine, it is absolutely essential to keep the ignition coil covers fitted in order to protect the injectors.