And the BMW standard for "left/right" is always the perspective of the driver from
behind the steering wheel.
So this way...it doesn't matter if the vehicle is RHD or LHD...from behind the wheel (regardless of which side it's on) the left side and right side is from this perspective of the driver as they sit in the vehicle behind the steering wheel. No way to confuse things if you can remember the correct "perspective".
For example, if you pull up the diagram for the cylinder heads...you can see clearly in the part nbr index that
#1 &
#2 are for
cyl 1-4 (which is BANK 1) and
#5 &
#6 is for
cyl 5-8 (which is BANK 2):