Radiator Coolant Overflow Bottle Dorman 603-122 - 1AROB00052


  • Includes:
    • Low fluid sensor
    • Overflow cap
  • Direct replacement
  • Replaces dealer part numbers: 25774005, 25713159
  • Strengthened and redesigned in the vulnerable areas of failure
  • Plastic construction
  • Commonly called "Coolant Overflow Tank or Reservoir, or Expansion Tank"


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.

5.0 / 5.0
2 Reviews
5 Stars
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3 Stars
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1 Stars
Perfect fit
Excellent ship time and car is like new again!!!
Thank you so much!
March 23, 2017
1 year ago
92 Cadillac Deville
The coolant tank recovery unit arrived in two days.We installed it without any problems . the unit fit like a glove . Thank you for your great service that you provide . Bob Strimple
March 11, 2017
1 year ago
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Vehicle Fit

  • 2000-2005 Cadillac Deville Radiator Coolant Overflow Bottle with Level Sensor V8 4.6L Dorman 603-122
  • 2001-2003 Olds Aurora Radiator Coolant Overflow Bottle with Level Sensor Dorman 603-122
  • 2004-2005 Pontiac Bonneville GXP Radiator Coolant Overflow Bottle with Level Sensor Dorman 603-122

This part replaces:

  • OE # 25713159
  • OE # 25774005
  • Dorman 603-122
Part #: 1AROB00052

Brand #: 603-122