Skip to content
Coolant Expansion Tank
Coolant Expansion Tank
GENUINE VW/AUDI Coolant Expansion Tank - 8K0-121-405 R
Coolant Expansion Tank
Coolant Expansion Tank
GENUINE VW/AUDI Coolant Expansion Tank - 8K0-121-405 R

Genuine Vw/Audi Coolant Expansion Tank 8 K0 121 405 R

GENUINE VW/AUDI
Availability:
Only 4 left!
SKU 8K0-121-405 R
$87.85 - $87.85
$87.85
$87.85 - $87.85
$87.85
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

Rewards
EARN REWARD POINTS
Purchasing this product will earn you 435 points to redeem on future purchases. Check your points.

Genuine VW/Audi coolant expansion tank (part number 8K0121405R). This OEM replacement tank ensures proper coolant level regulation and pressure release for your engine. Directly replaces the original part for a perfect fit on compatible VW and Audi models.

Key Features & Benefits

  • OEM Quality: Manufactured to factory specifications for reliability and durability.
  • Direct Replacement: Easy bolt-in installation without modifications.
  • Pressure Relief: Maintains correct system pressure to prevent overheating.

Technical Specifications

Part Number 8K0121405R
OEM Reference 8K0121405 R

Installation Notes

Direct replacement; allow engine to cool before installation.

About Genuine VW/Audi

Genuine VW/Audi parts are manufactured to original equipment standards, ensuring seamless compatibility and long service life.

This part also goes by the following cross reference.

Cross Reference Part Number: 8K0121405R

Fits These Vehicles 3 applications
Audi
Make Model Engine Years
Audi Q5 3.0L V6 2014–2016
Audi S5 2008–2009
Audi S5 4.2L V8 2010–2012

Fitment data last updated: 2026-07-18

Fits 3 vehicle applications Check vehicle fitment before ordering View fitment

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.