1988-92 Mazda 626 MX-6 Radiator Overflow Bottle with Cap Dorman 603-542 - 1AROB00242

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.

Item Condition: New

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.

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Vehicle Fit

Year Make Model Description
1988-1992Mazda 626 Mazda 626 Radiator Overflow Bottle with Cap
1988-1992Mazda MX-6 Mazda MX-6 Radiator Overflow Bottle with Cap without 4 Wheel Steering

This part replaces:

  • Dorman 603-542
  • OE # F20115350B
Part #: 1AROB00242

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

Brand #: 603-542