Part #: RA13603C

Universal Air RA13603C Radiator

Crossflow Radiator
6 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Crossflow Radiator
Fitment: Kia, Optima
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Crossflow Radiator for Kia Optima

Universal Air RA13603C is a crossflow radiator for 2016-2018 Kia Optima applications. It is built for direct vehicle-specific cooling system service and is listed for the N/A position.

Key Features

  • Crossflow radiator design for the listed Kia Optima fitment
  • Fits 2016-2018 Kia Optima, N/A
  • Part number RA13603C for accurate ordering and catalog matching
  • Universal Air Crossflow Radiator product line

Product Details

This radiator is intended for 2016, 2017, and 2018 Kia Optima models and supports replacement of the original cooling unit in the vehicle’s cooling system. The Universal Air Crossflow Radiator line focuses on application-specific radiator service, and RA13603C identifies this exact part for catalog lookup and fitment verification. If you are searching for a 2016-2018 Kia Optima radiator replacement or a Kia Optima crossflow radiator, RA13603C is the matching part number to reference.

What It Helps Address

  • Leaking or damaged radiator cores
  • Restricted coolant flow from internal blockage
  • Overheating caused by radiator failure
  • Cooling system service after impact or corrosion damage

Installation Notes

Verify the vehicle year and model before installation. Confirm radiator dimensions, hose connections, and mounting points against the removed unit and the vehicle’s cooling system layout. Flush the cooling system as needed and refill with the correct coolant specification after installation.

Quality Assurance

Universal Air identifies this part as part of its Crossflow Radiator line, and RA13603C is cataloged for the listed Kia Optima applications.

This part fits 6 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2018KiaOptimaEX Tech2.4LL4GASN/ACrossflow Radiator
2018KiaOptimaLX2.4LL4GASN/ACrossflow Radiator
2018KiaOptimaEX2.4LL4GASN/ACrossflow Radiator
2017KiaOptimaEX Pack2.4LL4GASN/ACrossflow Radiator
2016KiaOptimaLX2.4LL4GASN/ACrossflow Radiator
2016KiaOptimaEX2.4LL4GASN/ACrossflow Radiator

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.