Four Seasons 54628 A/C Evaporator Core

BMW A/C Evaporator Core for 1987-1997 Models

Restore cabin cooling performance with this Four Seasons evaporator core, part number 54628. Built as a tube and fin aluminum A/C evaporator core, it matches the dimensions and flange-style fittings needed for select BMW 7 Series, 8 Series, 5 Series, and M5 applications.

The Four Seasons Evaporator Core line focuses on direct-fit HVAC service parts for vehicles that need accurate core sizing, proper refrigerant connection points, and dependable heat exchange. This Four Seasons 54628 evaporator core is sized at 13-1/2 inches wide, 8 inches high, and 2-1/8 inches deep, with No. 8 inlet and No. 10 outlet flange fittings.

Key Features

• Aluminum tube and fin evaporator core construction
• Core dimensions: 13-1/2 in. width, 8 in. height, 2-1/8 in. depth
• No. 8 inlet fitting and No. 10 outlet fitting
• Flange-style inlet and outlet connections
• Direct replacement style for BMW HVAC service
• Four Seasons part number 54628

Detailed Description

This A/C evaporator core is used in the HVAC system to absorb heat from the air passing through the cabin side of the air conditioning unit. For BMW 840Ci, 850Ci, 850CSi, 740i, 740iL, 750iL, 735i, 735iL, 850i, 525i, 525iT, 530i, 535i, 540i, and M5 applications, correct core size and fitting style are critical for proper system service. The aluminum tube and fin design supports efficient refrigerant heat transfer while keeping the unit aligned with the original evaporator housing layout.

This part cross-references Dorman - HELP 55329 for the same application.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Refrigerant leaks at the evaporator core area
• Restricted airflow caused by a failing evaporator assembly
• HVAC performance loss from corrosion or internal damage
• Service issues on BMW A/C systems requiring the correct flange fittings

Installation Notes and Tips

Replacement on select BMW 525i and 750iL applications may require extended labor, specialized tools, and HVAC service experience. Verify the No. 8 inlet and No. 10 outlet flange connections before installation, and confirm the evaporator housing dimensions match the original unit. Proper evacuation, leak checking, and refrigerant recharge are required after service.

Quality Assurance

Four Seasons supplies HVAC replacement components for automotive air conditioning service, and this evaporator core is built to match the listed dimensions and connection style for the specified BMW applications. Confirm fitment by year, model, and fitting configuration before installation.