Isuzu NP-R NQ-R NR-R Radiator Overflow Bottle with Cap Dorman 603-5603 - DMROB00016


This radiator coolant overflow tank has been redesigned to fix issues with the original factory design.


  • Brand New Dorman Radiator Overflow Bottle
  • Commonly called "Coolant Overflow Tank" or "Reservoir"
  • Includes Cap
  • Replaces dealer part number: 8-98178-178-0, 8-97223-012-2, 8-97553-012-2, 8981781780, 8972230122, 8975530122
  • Strengthened and redesigned in the vulnerable areas of failure
  • Replacement for originals that are cracked or broken
  • 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 part.

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.

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Vehicle Fit

  • 1996-2007 Isuzu NP-R Radiator Overflow Bottle with Cap Dorman 603-5603
  • 1996-2010 Isuzu NQ-R Radiator Overflow Bottle with Cap Dorman 603-5603
  • 2005-2010 Isuzu NR-R Radiator Overflow Bottle with Cap Dorman 603-5603
Only 2 left in stock
Part #: DMROB00016

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

Brand #: 603-5603

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