Cadillac Radiator Coolant Overflow Bottle - 1AROB00207


  • Radiator Overflow Bottle
  • Commonly called "Coolant Overflow Tank or Reservoir, Surge Tank or Expansion Tank"
  • Plastic construction
  • Direct replacement
  • Built to strict quality control standards

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.

  1. step : Remove the battery (1:05)
    • Flip up the plastic cover
    • Remove the five 13 mm bolts securing the panel covering the battery.
    • Disconnect the NEGATIVE battery cable first.
    • Then disconnect the positive terminal.
    • Use a socket and extension to remove the 13 mm mounting bolt.
    • Pull the batter up and out of the engine bay.
  2. step : Remove the radiator coolant tank (2:57)
    • Use a flat blade screwdriver to disconnect the hose.
    • Remove the two 8 mm bolts and the 10 mm bolt.
    • Remove the bracket secured by the 10 mm bolt and set aside.
    • Disconnect the lead and the larger hose.
    • Place a catch pan under the vehicle, because when you remove the lower hose it will drain.
    • Remove the radiator fluid bottle.
  3. step : Install the new radiator fluid bottle. (7:00)
    • Hook up the lower hose and secure the clamp with a flat blade screwdriver.
    • Bolt the bottle down with your 8 and 10 mm socket.
    • Plug in the lead.
    • Connect the upper hose, tightening the clamp with your screwdriver.
    • Fill the radiator fluid reservoir up to the fill line with radiator coolant.
  4. step : Reinstall the battery (9:47)
    • Position the battery into place and bolt down the 13 mm mounting bolt.
    • Connect the positive battery terminal.
    • Then connect the negative battery terminal with your 8 mm wrench.
    • Bolt down the panel with the five 13 mm bolts.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 13mm Socket
  • 8mm Socket

5.0 / 5.0
1 Review
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
On time, in great shape
The product was as advertised and more importantly was the how to video for it! I will definitely shop with 1A Auto again
July 24, 2017
9 months ago
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Vehicle Fit

  • 1994-1999 Cadillac Concours Radiator Coolant Overflow Bottle
  • 1996-1999 Cadillac Deville Radiator Coolant Overflow Bottle
  • 1994-2002 Cadillac Eldorado Radiator Coolant Overflow Bottle
  • 1993 Cadillac Seville Radiator Coolant Overflow Bottle V8 4.6L (8th Vin Digit 9)
  • 1994-1997 Cadillac Seville Radiator Coolant Overflow Bottle

This part replaces:

  • Dorman 603-133
  • Hollander 671-00101
  • OE # 19129961
Part #: 1AROB00207

How-to Video:

(11:54 min)