Description
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A
Vehicle Fit

This radiator coolant overflow tank has been redesigned to fix issues with the original factory design.

Specifications:

  • Brand New Radiator Overflow Bottle
  • Commonly called "Coolant Overflow Tank" or "Reservoir"
  • Includes Cap
  • Replaces dealer part numbers: 3B0-121-321, 1K0-121-407-A, 3B0121321, 1K0121407A
  • Strengthened and redesigned in the vulnerable areas of failure
  • Replacement for originals that are cracked or broken
  • Plastic construction

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 part.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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.

  1. step : Removing the Coolant Bottle (0:40)
    • Remove the three 10mm bolts from the bottle
    • Disconnect the coolant sensor harness
    • Remove the two T25 Torx screws
    • Push the teeth and slide the hose clamp back with a pair of pliers
    • Disconnect the coolant hose
    • Push the teeth and slide the hose clamp back with a pair of pliers
    • Disconnect the lower coolant hose
  2. step : Installing the New Coolant Bottle (2:24)
    • Connect the lower coolant hose
    • Slide the hose clamp up into place
    • Connect the upper coolant hose
    • Slide the hose clamp up into place
    • Insert the coolant bottle into place
    • Tighten the two T25 Torx screws
    • Connect the coolant sensor harness
    • Tighten the three 10mm bolts to the bottle

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 10mm Socket

  • Torx Drivers & Sockets

  • T25 Torx Socket
  • T25 Torx Driver

5.00/ 5.0
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
2
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0
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Great Part
Sturdy, Fits Perfectly, Arrived Quickly. As good or better than the OEM part
January 23, 2017
Radiator Overflow
Prompt shipping. Item is solid and probably better than original.
February 27, 2017
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
I didnt see the Tiguan 2009 as one of the vehicles this reservoir fits. Will it work for the Tiguan 2009?
Karen D May 27, 2017
Yes, this will fit the 2009 Tiguan.
Alex P May 30, 2017
Year Make Model Description
2006-2013Audi A3 Audi A3 Radiator Overflow Bottle with Cap
2006-2013Audi A3 Quattro Audi A3 Quattro Radiator Overflow Bottle with Cap
2008-2011Audi TT Audi TT Radiator Overflow Bottle with Cap
2012-2013Audi TT Audi TT Radiator Overflow Bottle with Cap L4 2.0L
2008-2011Audi TT Quattro Audi TT Quattro Radiator Overflow Bottle with Cap
2012-2013Audi TT Quattro Audi TT Quattro Radiator Overflow Bottle with Cap L4 2.0L
2012-2014Volkswagen Beetle VW Beetle Radiator Overflow Bottle with Cap
2009-2013Volkswagen CC VW CC Radiator Overflow Bottle with Cap
2007-2013Volkswagen Eos VW Eos Radiator Overflow Bottle with Cap
2006-2009Volkswagen GTI VW GTI Radiator Overflow Bottle with Cap
2010-2013Volkswagen Golf VW Golf Radiator Overflow Bottle with Cap
2005-2009Volkswagen Jetta VW Jetta Radiator Overflow Bottle with Cap (8th Vin Digit K)
2010-2011Volkswagen Jetta VW Jetta Radiator Overflow Bottle with Cap
2012-2013Volkswagen Jetta VW Jetta Radiator Overflow Bottle with Cap
2006-2010Volkswagen Passat VW Passat Radiator Overflow Bottle with Cap
2012-2014Volkswagen Passat VW Passat Radiator Overflow Bottle with Cap
2006-2009Volkswagen Rabbit VW Rabbit Radiator Overflow Bottle with Cap
2009-2013Volkswagen Tiguan VW Tiguan Radiator Overflow Bottle with Cap
Part #: 1AROB00209


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(04:01 min)