URO 5Q0121407T Engine Coolant Reservoir

Brand URO 5Q0121407T
Color Clear
Shape Oval
Mounting Hole Quantity 2
Cap Type Not included
Cap Maximum Pressure Rating 10
Fits Audi and Volkswagen · 98 vehicles

OE dimensions. Precision-molded for compatibility with original sensors and connections.

Heat-resistant materials. Built to handle engine heat and harsh cooling system conditions.

Factory pressure-tested. Verified for dependable cooling system performance.

Cross-references URO 5Q0121407T, VAICO V10-3997 and 5Q0 121 407 T for the same application. See all 7.

$35.08Free shipping
In stock · usually ships same day before 1pm CST
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Free returns within 60 days if it doesn't fit when fitment is verified.

Engine Coolant Reservoir for VW and Audi

This URO engine coolant reservoir is built for direct replacement on select Volkswagen and Audi models. It uses an oval, clear tank design with OE-style mounting points and sensor/connection compatibility for a clean factory-style repair.

Key Features

  • Precision-molded to OE dimensions for proper fitment
  • Clear oval reservoir design for easy coolant level visibility
  • 2 mounting holes for secure installation
  • Cap not included
  • 10 psi maximum pressure rating
  • Factory pressure-tested for leak verification
  • Made with heat-resistant materials for cooling system service
  • 24 Month Unlimited Mileage Warranty

Detailed Description

URO part number 5Q0121407T is an engine coolant reservoir for Volkswagen and Audi cooling systems that require an OE-style replacement tank. The reservoir is molded to original dimensions to maintain alignment with factory sensors and connections, helping preserve proper coolant expansion and level management. This part number 5Q0121407T is a practical choice for drivers servicing a Volkswagen Tiguan, Volkswagen Golf, Audi A3, or Audi Q3 cooling system.

This part cross-references VAICO V10-3997 for the same application.

What It Helps Address

  • Cracked or leaking coolant expansion tank
  • Low coolant warnings caused by reservoir failure
  • Damaged mounting points on the original tank
  • Heat-related plastic deterioration in the cooling system
  • Fitment issues from an incorrect replacement reservoir

Installation Notes

Verify the cap type and pressure rating before installation, since the cap is not included. Confirm the reservoir matches the vehicle’s original sensor and hose connection layout, and inspect the surrounding cooling system components for wear before refilling. This reservoir is listed for multiple Volkswagen and Audi applications, including Fits 2018-2024 Volkswagen Tiguan, N/A and Fits 2015-2019 Audi A3, N/A.

Quality Assurance

URO states this reservoir is factory pressure-tested and made from materials selected to withstand engine heat and the harsh cooling system environment. It is backed by a 24 Month Unlimited Mileage Warranty.

This part fits 98 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersNotes
2024VolkswagenAtlas Cross Sport2.0LL4
2024VolkswagenJettaSport
2024VolkswagenTaosSE
2024VolkswagenTiguan
2023AudiQ3
2023AudiTT Quattro
2023AudiTTS Quattro
2023VolkswagenAtlasSE
2023VolkswagenAtlas Cross Sport2.0LL4
2023VolkswagenJettaSE
2023VolkswagenTaosSEL
2023VolkswagenTiguan
2022AudiA5 Sportback
2022AudiQ3
2022AudiTT Quattro
2022AudiTTS Quattro
2022VolkswagenAtlasSEL Premium R-Line
2022VolkswagenAtlas Cross Sport2.0LL4
2022VolkswagenJettaGLI Autobahn
2022VolkswagenTaosSE
2022VolkswagenTiguan
2021AudiA5 Sportback
2021AudiQ3
2021AudiTT Quattro
2021AudiTTS Quattro
2021VolkswagenAtlas2.0LL4
2021VolkswagenAtlas Cross Sport2.0LL4
2021VolkswagenGolfTSi
2021VolkswagenGTISE
2021VolkswagenJettaSE
2021VolkswagenTiguan
2020AudiA3Production Date Range: To 07/2019
2020AudiA3 QuattroProduction Date Range: To 07/2019
2020AudiQ3
2020AudiS3Production Date Range: To 07/2019
2020AudiTT QuattroProduction Date Range: To 07/2019
2020AudiTTS QuattroProduction Date Range: To 07/2019
2020VolkswagenAtlas Cross Sport2.0LL4
2020VolkswagenGolfTSi
2020VolkswagenGTIS
2020VolkswagenJettaSEL
2020VolkswagenTiguan
2019AudiA3
2019AudiA3 Quattro
2019AudiQ3
2019AudiS3
2019AudiTT Quattro
2019AudiTT RS Quattro
2019AudiTTS Quattro
2019VolkswagenArteon
2019VolkswagenAtlas
2019VolkswagenGolf
2019VolkswagenGolf Alltrack
2019VolkswagenGolf R
2019VolkswagenGolf SportWagen
2019VolkswagenGTI
2019VolkswagenJetta
2019VolkswagenTiguan
2018AudiA3
2018AudiA3 Quattro
2018AudiS3
2018AudiTT Quattro
2018AudiTT RS Quattro
2018AudiTTS Quattro
2018VolkswagenAtlas
2018VolkswagenGolf
2018VolkswagenGolf Alltrack
2018VolkswagenGolf R
2018VolkswagenGolf SportWagen
2018VolkswagenGTI
2018VolkswagenTiguan
2017AudiA3
2017AudiA3 Quattro
2017AudiS3
2017AudiTT Quattro
2017AudiTTS Quattro
2017VolkswagenGolf
2017VolkswagenGolf Alltrack
2017VolkswagenGolf R
2017VolkswagenGolf SportWagen
2017VolkswagenGTI
2016AudiA3
2016AudiA3 Quattro
2016AudiS3
2016AudiTT Quattro
2016AudiTTS Quattro
2016VolkswagenGolf
2016VolkswagenGolf R
2016VolkswagenGolf SportWagen
2016VolkswagenGTI
2015AudiA3
2015AudiA3 Quattro
2015AudiS3
2015VolkswagenGolf
2015VolkswagenGolf R
2015VolkswagenGolf SportWagen
2015VolkswagenGTI
2014VolkswagenGolf
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
URO — 5Q0121407TVAICO — V10-39975Q0 121 407 T5Q0 121 407A5Q0 121 407GCRT 21 000SURO-014639