2006-10 Radiator Overflow Bottle with Cap Dorman 603-055 - 1AROB00224

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How-To & Tools
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Vehicle Fit

Our coolant overflow bottles are some of the highest quality replacements on the market!


  • Brand New Radiator Overflow Bottle
  • Commonly called "Coolant Overflow Tank" or "Reservoir"
  • Strengthened and redesigned in the vulnerable areas of failure
  • Replacement for originals that are cracked or broken
  • Plastic construction
  • Includes Cap

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.

Item Condition: New

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.

  1. step : Removing the Coolant Reservoir Bottle (0:27)
    • Wait for the vehicle to cool
    • Have a drain pan ready
    • Remove the hose
    • Remove the two 10mm bolts from the bottle
    • Remove the bottle
  2. step : Installing the Coolant Reservoir Bottle (1:43)
    • Transfer over the wiring harness clip to the new bottle
    • Insert the coolant reservoir bottle into place
    • Tighten the two 10mm bolts to the bottle
    • Connect the hose
    • Refill the coolant

Tools needed for replacement:

    General Tools

  • Drain Pan

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 10mm Socket

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Year Make Model Description
2006-2010Ford Explorer Ford Explorer Radiator Overflow Bottle with Cap Dorman 603-055
2006-2010Ford Explorer Sport Trac Ford Explorer Sport Trac Radiator Overflow Bottle with Cap Dorman 603-055
2006-2010Mercury Mountaineer Mercury Mountaineer Radiator Overflow Bottle with Cap Dorman 603-055
Only 2 left in stock
Part #: 1AROB00224

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

Brand #: 603-055

How-to Video:

(02:27 min)