Withdrawal
Remove the mass air flow meter. To do this, turn the knurled nut -3- to the left and disconnect the plug. Loosen air hose clamp -1-. Using a screwdriver, press both clips -2- outwards.
Remove bolt -1- and pull air cleaner housing out of intake funnel -2- and rubber support -3-.
Unscrew retainer for expansion tank -arrows- and remove from air filter housing.
Installation
Air filter models 520i, 523i, 528i:
1 - compensation tank
2 - filter housing
3 - rubber support
4 - inlet funnel
5 - collar
6 - clamp
7 - sealing ring
8 - replaceable filter element
9 - holding frame
Screw on the expansion tank.
Insert the air filter housing with the lower rubber support into the receiver, while connecting the intake funnel to the wing. Tighten the mounting bolt.
Insert the mass air flow meter with a new O-ring and fasten it with clips.
Attach the intake manifold hose to the mass air flow meter and secure with a hose clamp.
Connect the plug of the mass air flow meter and fix the plug by turning the knurled nut to the right.