Instructions for desiccant insert replacement

Required Special Tools: 

• Refer to 32 1 270 

The desiccant insert does not  have to be changed at regular inspection intervals in a functioning, sealed air conditioning system.

However, the dryer flask or desiccant insert must be changed in case of: 

• contamination of the refrigerant with shavings (e.g. when the compressor is clamped).
• With depressurised and/or completely drained refrigerant circuit.
• Up to G series:  In case of a refrigerant circuit, which was closed using special tool 32 1 270  but remains open for more than 24 hours.
• From G-series on  In the case of a refrigerant circuit that was closed using special tool 32 1 270  but remains open for more than 48 hours.

The desiccant insert cannot be replaced in the following vehicles: 

• 1-Series E8x, 3-Series E9x  from 12/2008
• E84, E89 
• F series 
• G series 
• BMW i without heat pump 

In these vehicles, the condenser for the heating and air conditioning system must be replaced.

• BMW i 01 with heat pump 

On this vehicle the low pressure battery must be replaced.