Special tools required:
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:
The desiccant insert cannot be replaced in the following vehicles:
In these vehicles, the condenser for the heating and air conditioning system must be replaced.
On this vehicle the low pressure battery must be replaced.
BMW X3 Service & Repair Manual > Ac housing/evaporator, switching elements: Removing and installing/replacing expansion valve (N55, N47)
Special tools required:
00 9 030
WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety instructions:
Handling R 134a tetrafluorethane refrigerant .
HANDLING REFRIGERANT FLUID
IMP ...