2001-05 Honda Civic Radiator Overflow Bottle - 1AROB00164

Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit

Our coolant overflow bottles are some of the highest quality replacements on the market! This radiator coolant overflow has been designed to replace the original design.


  • Radiator Overflow Bottle 
  • Replaces dealer part numbers: 19101-PLC-000, 19109-PH1-620, 19101PLC000, 19109PH1620
  • Plastic construction
  • Direct replacements
  • Built to strict quality control standards

Replace your missing or cracked tank now with this great fitting radiator overflow bottle reservoir.

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 Battery (0:43)
    • Loosen the negative battery cable with a 10mm wrench
    • Loosen the positive batter cable with a 10mm wrench
    • Pull the clip from the mounting bolt
    • Remove the mounting bolts with a 10mm wrench
    • Remove the battery mount
    • Remove the battery cover
    • Lift the battery up and out
  2. step : Removing the Coolant Reservoir (2:08)
    • Remove the 10mm bolt from the reservoir
    • Unclip the reservoir hose clips as you pull the reservoir out
    • Pry off the wire clip from the hose
    • Twist the hose off from the reservoir
  3. step : Installing the Coolant Reservoir (3:24)
    • Insert the clip into place
    • Press the hose to the reservoir bottle
    • Lower the reservoir into place
    • Tighten the 10mm bolt to the reservoir
  4. step : Installing the Battery (5:30)
    • Insert the battery into place
    • Replace the battery cover
    • Insert the battery mount into place
    • Reinstall the 10mm bolts
    • Connect the positive battery cable with a 10mm wrench
    • Connect the negative battery cable with a 10mm wrench
    • Replace the clip to the mounting bolt

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Rust Penetrant

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 10mm Socket

  • Wrenches - Metric

  • 10mm Wrench

5.00/ 5.0
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Radiator overflow bottle fit perfectly. Great product.
June 22, 2017
Good as OEM
Fits in just like the OEM one.. so far so good zero issues with the part. Installation was tops 20 minutes, the online videos were super helpful.
July 21, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
No questions have been asked about this item.
Year Make Model Description
2001-2005Honda Civic Honda Civic Coupe Radiator Overflow Bottle
2001-2005Honda Civic Honda Civic Sedan Radiator Overflow Bottle
Part #: 1AROB00164

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:

(06:49 min)