Four Seasons 3878R A/C Compressor Kit

Four Seasons PAC-Kit w/ Reman Compressor 3878R

Four Seasons 3878R is an A/C compressor kit for select Hyundai Sonata and Kia Optima applications with an HS18 compressor. This PAC-Kit w/ Reman Compressor is built for direct-fit HVAC service on confirmed vehicle applications, including 2002 Hyundai Sonata, 1999-2001 Hyundai Sonata, and 2001 Kia Optima.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for HVAC A/C compressor replacement
• Remanufactured compressor assembly for HS18 compressor applications
• Application-specific fitment for Hyundai Sonata and Kia Optima models listed below
• Part number 3878R for accurate ordering and service lookup
• Includes related service components referenced by the application listing

Application Details

Compatible With 2002 Hyundai Sonata, N/A; 1999-2001 Hyundai Sonata, N/A; and 2001 Kia Optima, N/A. The 3878R kit is listed for vehicles with an HS18 compressor and is tied to the specific model-year coverage shown in the fitment data. If you are servicing a Hyundai Sonata or Kia Optima A/C system in these years, verify the compressor type before installation.

This part cross-references 57185 and 83062 for the same application.

Common A/C Problems It May Address

• Loss of cabin cooling from compressor wear or failure
• Noisy A/C compressor operation
• System performance issues tied to a failing HS18 compressor
• Service needs after compressor replacement on listed Sonata and Optima vehicles
• Restoration of A/C function after component-level HVAC repair

Installation Notes and Tips

Confirm the vehicle’s compressor type and model year before ordering. For best results, inspect the A/C system for contamination, verify the expansion valve and filter drier condition, and follow proper evacuation, flushing, and oil service procedures during repair. Use the fitment notes to match 3878R to the exact Hyundai Sonata or Kia Optima application.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repair, and this PAC-Kit is cataloged for the specific applications listed above. Part number 3878R should be matched to the vehicle fitment data to ensure correct service selection.