1AROB00226-2002-05 Ford Explorer Mercury Mountaineer Coolant Reservoir


2002-05 Ford Explorer Mercury Mountaineer Coolant Reservoir Dorman 603-070

Dorman 1AROB00226 1AROB00226
Save 39%
List: $92.95 Save: $36.00
Only 2 left in stock
Part 1AROB00226
In Stock

Orders must be placed by 2pm ET
Delivery options for:

Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Brand #: 603-070

Frequently bought together


Vehicle Fit

Warranty & Shipping
How-To & Tools

Item Condition: New

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.

FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories.  Shipping is not available to Canada.

Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses.  Final shipping costs are available at checkout.

How to Replace Radiator Overflow Bottle 02-05 Mercury Mountaineer

Created on: 2021-01-16

How to repair, install, fix, change or replace a broken, damaged, split or leaking radiator coolant overflow bottle on 02, 03, 04, 05 Ford Explorer or Mercury Mountaineer.

  1. step 1 : Removing the Air Filter Box
    • Unclip the air box cover
    • Pull out the air filter by hand
    • Lift the air filter box up and out
  2. step 2 : Removing the Coolant Bottle
    • Slide back the coolant bottle hose clamps with pliers
    • Clamp the lower coolant bottle hose with vise-grip pliers
    • Pull the upper hose off the coolant bottle
    • Remove the three 10mm bolts from the coolant bottle
    • Pry the lower hose off the coolant bottle with a flat blade screwdriver
    • Pull the coolant bottle up and out
  3. step 3 : Installing the Coolant Bottle
    • Push the lower hose onto the coolant bottle
    • Remove the vise grip pliers from the lower hose
    • Lower the coolant bottle into place
    • Push the upper hose onto the coolant bottle
    • Insert the three 10mm bolts into the coolant bottle
    • Tighten the hose clamps with pliers
  4. step 4 : Installing the Air Box
    • Lower the air box into place using the locating tabs
    • Put the air filter into the air box
    • Clip on the air box cover
  5. step 5 : Filling the Coolant
    • Twist off the coolant bottle cap
    • Add coolant to the cold fill line
    • Twist on the coolant cap
    • Run the engine briefly
    • Allow it to cool down
    • Check the coolant level
    • Add coolant as necessary

Tools needed for replacement

  • Pliers, Cutters & misc Wrenches

    Slip-Joint Pliers

  • Ratchets & Related


  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    10mm Socket

Installation Video
Watch video

Fits these Makes

Year Make Model Description
2002-2005Ford Explorer Ford Explorer Coolant Reservoir
2002-2005Mercury Mountaineer Mercury Mountaineer Coolant Reservoir

Part Interchange

Brand Label Part Number
DIY Solutions HVA02796

This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.

Brand #: 603-070
Product Reviews
5.00/ 5.0 1
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
April 12, 2019
Just what they said it was perfect fix great price
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
No questions have been asked about this item.
Customer service


Monday - Friday 8:00am - 9:30pm ET
Saturday - Sunday 8:00am - 4:30pm ET

2002-05 Ford Explorer Mercury Mountaineer Coolant Reservoir Dorman 603-070-1AROB00226 does not fit your:

Same Day Shipping

Orders ship same day when ordered by 2pm ET. Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Providing you the highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations every day, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos specific to year, make and model guide you step-by-step through your repair.

Before proceeding,

select your Vehicle, to verify this Part will fit.

This part will only fit a vehicle with these options.