N52K only
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
Unclip plug connection (1) from holder (2) and disconnect.
Unclip wiring harnesses from holder (2) and connector strip (3).
Disconnect holder (2) from fuel rail.
Remove protective cap from compressed air valve.
Connect compressed air line (1) to compressed air valve.
Blow fuel back into tank with a short blast of compressed air (max. 3 bar).
Unlock and detach fuel line (1).
Close off fuel line (1) with special tool 13 5 161.
Detach connector strip (2) in direction of arrow.
Release screws.
Tightening torque 13 53 1AZ .
Remove fuel rail (3).
Lever out retainers (1).
Pull fuel injectors out of fuel rail.