You need to remove the rear panel-prob about a dozen or so Torx screws
(T20/T25) Usually 2 either side centrally are larger ones.
Easier to get at the motor if you lean the machine against the kitchen unit
at 45 degrees.
Remove belt
Remove the two 12mm motor supporting bolts
Remove the plug to the motor and earth cable
Prise the motor forward with a flat blade screwdrive and it should come
away from the supports.
Replace brushes
Schematics here
https://www.bosch-eshop.com/eshop/bosch/gb/prodp.htm?prod=WFL2000GB/01
(T20/T25) Usually 2 either side centrally are larger ones.
Easier to get at the motor if you lean the machine against the kitchen unit
at 45 degrees.
Remove belt
Remove the two 12mm motor supporting bolts
Remove the plug to the motor and earth cable
Prise the motor forward with a flat blade screwdrive and it should come
away from the supports.
Replace brushes
Schematics here
https://www.bosch-eshop.com/eshop/bosch/gb/prodp.htm?prod=WFL2000GB/01