Our coolant overflow bottles are some of the highest quality replacements on the market! This radiator coolant overflow tank has been designed to replace the original design.


  • Radiator Overflow Bottle
  • Commonly called "Coolant Overflow Tank or Reservoir, or Expansion Tank"
  • Plastic construction
  • Replaces dealer part number: 25430-38050, 25430-3C050, 2543038050, 254303C050
  • Direct replacement
  • Built to strict quality control standards

Now you can buy a high quality coolant reservoir that is built to strict quality control standards. Replace your broken or cracked one now with this great fitting radiator overflow bottle.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

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where are the minimum and maximum levels located?
Sally R on Mar 21, 2016
BEST ANSWER: Same as the OEM part. Your owners manual may have the specific details in the fluids and levels section.

Vehicle Fit

  • 1999-2005 Hyundai Sonata Radiator Coolant Overflow Bottle
  • 2001 Hyundai XG300 Radiator Coolant Overflow Bottle
  • 2002-2005 Hyundai XG350 Radiator Coolant Overflow Bottle
  • 2001-2006 Kia Magentis Radiator Coolant Overflow Bottle
  • 2001-2005 Kia Optima Radiator Coolant Overflow Bottle
  • 2006 Kia Optima (5th Vin Digit D) Radiator Coolant Overflow Bottle

This part replaces:

  • OE # 254303C050
  • OE # 2543138050
  • Hollander 671-50329
Part #: 1AROB00185