2000-07 Ford Focus Radiator Overflow Bottle with Cap - 1AROB00129

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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"
  • 16 PSI Cap included
  • Replaces dealer part numbers: 3S4Z-8A080-AC, 5S4Z-8101-AA, 3S4Z8A080AC, 5S4Z8101AA
  • Direct replacement
  • Plastic construction

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

Attention California Customers:

WARNING:  This product can expose you to chemicals including Styrene and Bisphenol A (BPA), which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

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 Overflow Bottle (0:36)
    • Remove the 11mm bolt from the overflow bottle
    • Push the overflow bottle hose clamp teeth together with locking pliers
    • Slide the hose clamps down
    • Pry the hoses off with a flat blade screwdriver
    • Push the teeth together on the large hose clamp
    • Slide the hose clamp back
    • Twist the hose off halfway
    • Lock the pliers onto the clip
    • Remove the hose
    • Remove the overflow bottle
  2. step : Installing the Coolant Overflow Bottle (1:46)
    • Insert the overflow bottle
    • Place the overflow bottle hose into place
    • Remove the locking pliers from the clamp
    • Slide the hose clamp up
    • Place the hoses onto the overflow bottle
    • Slide the hose clamps up
    • Push the overflow bottle onto the clip
    • Insert the 11mm bolt
    • Refill the overflow bottle

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Anti-Freeze

  • Pliers, Cutters & misc Wrenches

  • Vise Grip Pliers

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Flat Blade Screwdriver

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Year Make Model Description
2000-2007Ford Focus Ford Focus Radiator Overflow Bottle with Cap
Part #: 1AROB00129

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(03:06 min)