Description

25620-D5000 WARMER A.T.F: Technical Guide

Optimal Fluid Regulation | Sonata & K5 Smartstream Engines

The 25620-D5000 WARMER A.T.F is the essential transmission component designed to restore the thermal integrity of your Hyundai or Kia gearbox. This unit ensures maximum heat exchange efficiency and superior structural integrity.

Vehicle Compatibility

  • Hyundai Sonata: 2020-Present (DN8)
  • Kia K5: 2020-Present (DL3)
  • Engine: 1.6T-GDI / 2.5L Smartstream
  • Transmission: 8-Speed Auto / DCT
  • Part Number: 25620-D5000

25620-D5000 WARMER A.T.F Specs

  • Type: ATF Cooler/Warmer Unit
  • Material: High-Grade Brazed Aluminum
  • Core: Multi-Plate Heat Exchanger
  • Ports: 4-Port Fluid Interface
  • Standard: OE Precision Grade

Drivetrain Maintenance Benefits

Choosing the correct replacement part is vital for preventing the destructive cross-contamination of engine coolant and transmission oil. Using a premium 25620-D5000 WARMER A.T.F ensures that your gearbox remains protected from thermal spikes and internal wear. We strongly recommend browsing our Transmission Parts and Cooling System Components to ensure a complete and professional vehicle service.

Confirm Professional Fitment

To ensure this ATF warmer is the perfect fit for your specific vehicle, please contact us for professional verification using your chassis number.


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Note: Original manufacturer part numbers are for identification and compatibility reference purposes only.

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Questions and Answers

What is the primary function of this thermal assembly?

It facilitates a heat exchange between the engine coolant and the transmission fluid to ensure the ATF stays at the optimal operating temperature.

Which vehicles utilize the 25620-D5000 WARMER A.T.F?

It is standard fitment for the newer 1.6L Turbo and 2.5L Smartstream engines found in the Hyundai Sonata and Kia K5.

What are the symptoms of a failing transmission warmer?

Common signs include transmission fluid mixed with engine coolant (milky appearance), erratic gear shifting, or a transmission overheat warning light.

Is this component a direct replacement for the original part?

Absolutely. This unit is manufactured to meet exact OE dimensional and pressure-testing specifications for a professional, leak-free installation.

Why is temperature regulation critical for modern 8-speed gearboxes?

Modern gearboxes are highly sensitive to heat; this assembly prevents fluid breakdown, ensuring that internal clutches remain properly lubricated and cooled.


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