2003-08 Mazda 6 Radiator Overflow Bottle with Cap Dorman 603-543 - 1AROB00152

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 with Cap
  • Commonly called Coolant Overflow Tank, Reservoir, or Expansion Tank
  • Plastic construction
  • Replaces dealer part numbers: AJ57-15-350D, AJ57-15-350E, AJ5715350D, AJ5715350E
  • 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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Vehicle Fit

  • 2003-2008 Mazda 6 Radiator Overflow Bottle with Cap V6 3.0L

This part replaces:

  • OE # AJ5715350D
  • OE # AJ5715350E
  • OE # AJ5715
  • Hollander 671-50399
  • Dorman 603-543
Part #: 1AROB00152
Brand #: 603-543