Main parts of the air filter:
1 - air filter assembly; 2 - cover fastening nut; 4 — lid; 5 — filter element; 6 - spring holder; 7 - sealing ring; 9 — heated air intake hose; 11 - Corrugated cold air intake hose; 13 — tension clamp; 14 - thermostat.
[Examine the original source using the link on the website: BMWMAN]