Toyota Highlander Radiator Overflow Bottle with Cap - 1AROB00245

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.

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. Please keep your invoice for proof of this warranty.

  1. step : Removing the Coolant Overflow Reservoir (0:25)
    • Loosen the hose clamp from the overflow hose
    • Loosen the overflow hose from the radiator filler neck
    • Remove the cap from the bottle
    • Lift the bottle off of the bracket
  2. step : Installing the Coolant Overflow Reservoir (1:25)
    • Snap the overflow reservoir into place
    • Connect the overflow hose to the filler neck
    • Tighten the hose clamp
    • Refill the overflow bottle with the appropriate mixture

Tools needed for replacement:

    General Tools

  • Funnel

  • Materials, Fluids, and Supplies

  • Anti-Freeze

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

There are no reviews for this item. Write Review
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Vehicle Fit

  • 2004-2005 Toyota Highlander Radiator Overflow Bottle with Cap
  • 2006-2007 Toyota Highlander (excluding Hybrid Models) Radiator Overflow Bottle with Cap

This part replaces:

  • OE # 1647020100
  • Dorman 603-326
Only 1 left in stock
Part #: 1AROB00245

Ships Same Day for orders placed by 4 P.M. ET

How-to Video:

(02:34 min)