Models 520i, 525i
Withdrawal (see drawing W - 1075)
Loosen clamp 1, detach air hose from retainer -arrow- on air filter housing and pull out.
Cut off the loops of the water hose 2 on the air filter housing.
Disconnect plug connection 3 for air mass meter. On release models from May 1990 (M30 engine) first turn the connector to the left and then disconnect.
Loosen clamp 1 and detach hose.
Loosen the nuts 2 of the rubber supports and pull the air filter housing up with the air mass meter.
Installation
Insert the air filter housing into the rubber supports and screw
Connect the air hose to the body and secure it with a clamp.
Fasten the water hose to the air filter housing with mounting loops
Connect the air mass meter connector.
Connect the alternator air hose and secure with a clamp.
Model 524td
Withdrawal
Loosen nut 1.
Loosen clamp 2 with a 7 mm wrench. or a screwdriver and push back.
Detach air hose 3 from air filter 4.
Remove the air filter from the studs and pull it up.
Installation
Insert the air filter from below into the 2 rubber supports, connect from above and secure with a nut.
Connect the air hose and secure with a clamp.