64 53... Instructions for desiccant insert replacement
Special Tools
A desiccant insert that is in a correctly functioning, sealed heating and air conditioning system does not have to be changed at regular service-inspection intervals.
However, the dryer flask or desiccant insert must absolutely be replaced in the event of
- contamination of the refrigerant with dirt/debris (e.g. when the compressor is clamped).
- With depressurized and/or completely drained refrigerant circuit.
- With a refrigerant circuit, which was closed using special tool 32 1 270 but remains open for more than 24 hours.
The desiccant insert cannot be replaced in the following vehicles:
- 1-Series E8x, 3-Series E9x from 12/2008
- E84, E89
- 1-Series F2x, 3-Series F3x
In these vehicles, the condenser for the heating and air conditioning system must be replaced.