Toyota Sienna Radiator Overflow Bottle (with Fan Shroud) Dorman 603-434 - 1AROB00135

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.


  • Includes the Radiator Fan Shroud
  • Direct replacement for originals that are cracked or broken
  • Replaces dealer part numbers: 16711-0A210, 16711-0A220, 167110A210, 167110A220, 88972524
  • Strengthened and redesigned in the vulnerable areas of failure
  • 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.

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.

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 Toyota Sienna Radiator Overflow Bottle (with Fan Shroud) with Tow Package Dorman 603-434
  • 2004-2005 Toyota Sienna Radiator Overflow Bottle (with Fan Shroud) without Tow Package Dorman 603-434
  • 2005 Toyota Sienna Radiator Overflow Bottle (with Fan Shroud) Tow Package (Built Before 7/05 Production Date) Dorman 603-434
Only 4 left in stock
Part #: 1AROB00135

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

Brand #: 603-434

We're here to help

1A Auto Parts

Customer Feedback

"Thanks for the fast reliable service. Great price, and the headlights were as good as oem or better!!! Keep up the good work..."
- Dwuan M.
Read More