Replaces

Radiator Overflow Bottle with Cap Dorman 603-703 - 1AROB00036

DORMAN 603-703 [COOLANT RESERVOIR]

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.

Specifications:

  • Direct replacement for originals that are cracked or broken
  • Replaces dealer part numbers: 8D0121403L, 3B0121321, 8D0 121 403 L, 3B0 121 321
  • Strengthened and redesigned in the vulnerable areas of failure
  • Plastic construction
  • Commonly called "Coolant Overflow Tank or Reservoir" by Audi & Volkswagen
  • Cap included

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.

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Vehicle Fit

  • 1998 Audi A4 Radiator Overflow Bottle with Cap V6 2.8L (From VIN W007800) Dorman 603-703
  • 1998 Audi A4 Radiator Overflow Bottle with Cap L4 1.8L (From VIN W007800) Dorman 603-703
  • 1999-2002 Audi A4 Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1999-2002 Audi A4 Radiator Overflow Bottle with Cap L4 1.8L Dorman 603-703
  • 1998 Audi A4 Quattro Quattro Radiator Overflow Bottle with Cap L4 1.8L Dorman 603-703
  • 1998 Audi A4 Quattro Quattro Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1998 Audi A4 Quattro Radiator Overflow Bottle with Cap V6 2.8L (From VIN W007800) Dorman 603-703
  • 1998 Audi A4 Quattro Radiator Overflow Bottle with Cap L4 1.8L (From VIN W007800) Dorman 603-703
  • 1999-2002 Audi A4 Quattro Quattro Radiator Overflow Bottle with Cap L4 1.8L Dorman 603-703
  • 1999-2002 Audi A4 Quattro Quattro Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1999-2002 Audi A4 Quattro Radiator Overflow Bottle with Cap L4 1.8L Dorman 603-703
  • 1999-2002 Audi A4 Quattro Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1998-2001 Audi A6 Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1998-2001 Audi A6 Quattro Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 2003 Audi RS6 Radiator Overflow Bottle with Cap Dorman 603-703
  • 2004 Audi RS6 Radiator Overflow Bottle with Cap V8 4.2L Dorman 603-703
  • 2000-2002 Audi S4 Radiator Overflow Bottle with Cap V6 2.7L Dorman 603-703
  • 1998-2004 VW Passat Radiator Overflow Bottle with Cap V6 2.8L Dorman 603-703
  • 1998-2005 VW Passat Radiator Overflow Bottle with Cap L4 1.8L Dorman 603-703
  • 2004-2005 VW Passat Radiator Overflow Bottle with Cap L4 2.0L Diesel Dorman 603-703

This part replaces:

  • Dorman 603-703
  • OE # 3B0121321
  • OE # 8D0121403L
  • Hollander 671-50103
Part #: 1AROB00036


Order must be placed by 4pm ET
Dorman
Brand #: 603-703