Below is a description for models with M51 and M52 engines. On models with other engines, removal and installation of the starter is similar.
1. Disconnect the negative cable from the battery.
2. Remove the nuts and disconnect the electrical wiring from the starter.
On some models, it is necessary to first remove the air intake tract blocking elements and fuel hoses.
3. Loosen the nuts and remove the starter.
4. Check the condition of the starter gear and, if necessary, repair or replace the starter. Installation is carried out in the reverse order.
[The article text was copied from an online resource BMWman.ru]