BMW 64119320341 Control Unit, Automatic Air Conditioner., High

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To remove the Heater Assembly from a vehicle, follow these steps: Start by having the air conditioning refrigerant discharged and recovered. In the rear of the engine compartment, remove the cabin air filter cover mounting bolts, cover, and slide out the filter. Remove plastic covers behind the strut tower in the engine compartment and unclip attached wiring harnesses. Pull the cable guide from the cabin air filter lower housing and remove the housing. For models with strut tower supports, remove the plastic cap from the center of the cowl trim panel, take out the center bolt, and remove the outer end bolts of the support, keeping the grommets in place. Detach the refrigerant lines from the expansion valve at the firewall, and then remove the valve and the plate behind it. Remove the complete instrument panel. Remove the cap and bolt beneath it from the firewall. Unclip the footwell air ducts from the heater assembly. Clamp the heater hoses close to the firewall or drain the cooling system. Disconnect the heater hoses at the firewall and remove the fasteners securing the heater assembly near the coolant hose connections. Note the positioning and routing of all wiring harnesses/cable ducts from the instrument panel crossmember before removing them. With assistance, remove the instrument panel crossmember, wearing gloves due to sharp edges. Remove the heater assembly from the passenger side, ensuring the evaporator drain grommet in the floor is clear.