Win this M240i!
Every $50 spent = 1 entry*

No purchase necessary to enter or win. See official rules.

Win this M240i!
Every $50 spent = 1 entry*

No purchase necessary to enter or win. See official rules.


Coolant Expansion Tank Replacement Kit

Everything you need to replace your faded, cracked, or leaky expansion tank!
Mfg Part #
3B0121321KTKT2
ECS Part #
ES#3658445
Brand
Assembled By ECS
47.52
$50.02 (Sale - Save 5%)
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on orders $49 and up
Availability: Inventory On Order, ETA Sep 30, 2021
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Product Details

The coolant expansion tank in your vehicle gives additional coolant a home after expansion and contraction from temperature change. Being that it is subjected to such drastic changes on a regular basis, it can often crack and break.

ECS Tuning has created this convenient kit with quality parts. It includes everything you need to bolt on a brand new tank. If your tank has experienced damage, this kit is for you!

The kit includes:

  • Rein Coolant Expansion Tank
  • Uro Expansion Tank Cap
  • Expansion tank hardware

This Part Fits the Following Vehicles

Make Model Submodel Engine
Audi B8 A4 FWD 2.0T
Audi B8 A4 Quattro 2.0T
Audi B8 A5 Quattro 2.0T
Audi C5 Allroad All 2.0T
Audi Q5 Quattro 2.0T
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

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Manufacturer names and/or part numbers are used only for identification purposes.

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