Four Seasons 54878 A/C Evaporator Core

Four Seasons 54878 Evaporator Core

The Four Seasons 54878 evaporator core is an aluminum, plate-and-fin A/C evaporator core built for select Nissan Maxima and INFINITI I30 applications. It uses male insert O-ring inlet and outlet connections for a direct-style HVAC service replacement.

Four Seasons Evaporator Core line parts are built around application-specific dimensions and connection styles, helping match the original HVAC layout in the vehicle. This unit measures 9-1/4 inches wide, 10 inches high, and 2-7/8 inches deep, with No. 8 inlet and No. 10 outlet fittings.

Key Features

• Aluminum plate-and-fin evaporator core construction
• Core dimensions: 9-1/4 in. width, 10 in. height, 2-7/8 in. depth
• Male insert O-ring inlet fitting, No. 8 outside diameter
• Male insert O-ring outlet fitting, No. 10 outside diameter
• Application-specific HVAC replacement for select Nissan Maxima and INFINITI I30 models
• Four Seasons part number 54878

Detailed Description

Four Seasons 54878 is an A/C evaporator core designed for HVAC systems that require a plate-and-fin aluminum core with the listed inlet and outlet fitting sizes. The core width, height, and depth are specified to support proper fitment in the original evaporator housing, while the O-ring connection style matches common factory-style refrigerant line interfaces. This part cross-references UAC EV3009PFC for the same application.

Compatible With 1995 Nissan Maxima, 1996 Nissan Maxima, 1997-1999 Nissan Maxima, 1996 INFINITI I30, and 1997-1999 INFINITI I30. For 1995 Nissan Maxima, the application is listed with ATC (Automatic Temperature Control) from 10/95. For 1996 Nissan Maxima and 1996 INFINITI I30, the application is listed from 5/96, with an additional 1996 Nissan Maxima listing for ATC vehicles through 4/96.

What It Helps Address

• Loss of cabin cooling performance from a restricted or leaking evaporator core
• Refrigerant odor or residue associated with evaporator leakage
• Uneven A/C outlet temperatures caused by internal HVAC core damage
• HVAC service needs on select Nissan Maxima and INFINITI I30 vehicles
• Replacement of a corroded or physically damaged evaporator core

Installation Notes and Tips

Verify the vehicle’s build date, ATC configuration, and line connection sizes before installation. Confirm the evaporator housing dimensions and refrigerant line fitment against the original part, and replace the O-rings during service using the correct refrigerant-compatible seals. Proper evacuation, leak checking, and recharge procedures should be followed after installation.

Quality Assurance

Four Seasons HVAC components are cataloged by application and dimensional specification to support accurate replacement selection. Confirm part number 54878 against the vehicle’s original evaporator core and service information before installation.