Please put your bike's year of manufacture along with its model in your
Profile. Parts can vary in some years.
Go to a BMW dealer's parts fiche then look at the
Oil Pan diagram in the
Engine section of your model and year.
This is a useful one. Shipping small parts is costly. If you have a local dealer, call them up.
Riders' opinions vary on which parts to replace at an oil change. As Scott_ has indicated, reuse of parts will work. Some riders don't drain the oil by removing the plug at all but just loosen the oil filter cover screws, let the oil drain then remove the cover to replace the filter. If you don't know when the last time the plug was removed, remove it and reinstall it with a new washer.
What do you mean by
oil filter gasket? The oil filter gasket that contacts the filter mounting flange within the crankcase is usually attached to these bikes' oil filters when you buy them.
What you must observe when you remove the used filter is that
its gasket is not stuck to the mounting flange in the crankcase. Remove it if it is. If you neglect to check and it remains, coupling your new filter and its gasket to it will likely cause your new filter to eventually loosen then oil pressure will drop.
:grimreaper:
Get cup-style filter wrenches that will closely fit the filters you are removing and installing. If this bike's engine hasn't been serviced in years, removing the filter might be difficult.