from 318is maintenance
Prise out the LH cover grill. It is sprung at the bottom (front) and held at the top. I used a couple of screwdrivers and folded towel to protect the paintwork.
Remove ~3 7mm bolts in the panel that runs across the bulkhead. They are recessed, so a socket is best. Some models aslo have plastic screw caps too.
Remove the weather strip and pull back the panel as much as possible.
Tippex the motor spindle to the wiper arm and one of the slots in the motor bracket to its bolt for reorientation later.
Remove the 10mm centre nut and shock the arm off.
Release the three 13mm hold down nuts. Note the orientation of the splash guard.
Detach the power cable.
Lift out the motor via the panel access. It may be easier to release the 3 10mm bolts that hold on the motor bracket - but try not to take this out.
#### I have a 320i and found it much easier undoing the bolts on the motor mount bracket