Global Parts 3412048 A/C Expansion Valve - Rear

A/C Expansion Valve for Rear HVAC Service

Global Parts 3412048 is a rear A/C expansion valve for BMW HVAC service applications. It meters refrigerant flow before the evaporator so the system can absorb heat efficiently and maintain stable cooling performance.

Compatible with select 2017-2019 BMW rear A/C applications, including BMW 750i, BMW 750i xDrive, BMW M760i xDrive, BMW M5, and BMW M550i xDrive.

Key Features

• Rear A/C expansion valve for refrigerant flow control
• Helps regulate refrigerant entering the evaporator
• Supports efficient heat exchange in the HVAC system
• Global Parts part number 3412048
• Cross-references Four Seasons 39586 for the same application

Detailed Description

The Global Parts 3412048 expansion valve is used in rear HVAC systems to reduce refrigerant pressure before it reaches the evaporator. That pressure drop allows the refrigerant to absorb heat more effectively, which is a key part of consistent cabin cooling. This part number 3412048 is a direct-fit service component for BMW rear A/C applications listed below, including 2018-2019 BMW 750i rear and 2017-2019 BMW M760i xDrive rear.

Global Parts recommends replacing the expansion valve/orifice tube whenever the A/C system is serviced, especially after contamination, compressor failure, or restricted cooling performance. For BMW 750i, BMW 750i xDrive, BMW M760i xDrive, BMW M5, and BMW M550i xDrive rear HVAC repairs, this component helps restore proper refrigerant metering.

Common Issues This Part May Address

• Weak rear A/C cooling
• Irregular evaporator refrigerant flow
• Restricted or inefficient HVAC performance
• Service replacement after A/C contamination
• Cooling loss following compressor or system repair

Installation Notes and Tips

Verify the rear HVAC configuration before ordering and match the vehicle application to the listed fitment. During A/C service, inspect the system for debris, moisture, and contamination, and replace related service components as needed. Proper evacuation, leak checking, and recharge procedures are required after installation.

Quality Assurance

Global Parts supplies HVAC service components for repair applications, and this expansion valve is built for the listed BMW rear fitments. Part number 3412048 is also referenced by UAC EX9781C and Four Seasons 39586 for the same application.