Genuine 1K0121087H Engine Coolant Tee

Brand Genuine 1K0121087H
Fits Audi and Volkswagen · 28 vehicles

OE direct replacement. Engine coolant tee for straightforward hose routing.

Genuine part for dependable cooling-system service.

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Engine Coolant Tee for Audi and Volkswagen

This Genuine engine coolant tee, part number 1K0121087H, is a direct-fit cooling system connector for select Audi and Volkswagen models. It installs at the upper radiator hose to thermostat hose junction and helps maintain a secure coolant path in the engine cooling circuit.

Key Features

  • Genuine OE replacement coolant tee
  • Part number 1K0121087H
  • Fits the upper radiator hose to thermostat hose connection
  • Compatible with select Audi TT, TT Quattro, A3, and Volkswagen Eos, GTI, Jetta, and Passat applications
  • Built for vehicles with 2.0L applications where noted in fitment

Fitment Details

  • Fits 2014-2015 Audi TT Quattro, N/A, at Upper Radiator Hose to Thermostat Hose
  • Fits 2010-2011 Audi TT Quattro, N/A, at Upper Radiator Hose to Thermostat Hose
  • Fits 2012-2013 Audi TT Quattro, N/A, 2.0L; at Upper Radiator Hose to Thermostat Hose
  • Fits 2009 Audi TT Quattro, N/A, 2.0L; at Upper Radiator Hose to Thermostat Hose
  • Fits 2008-2009 Audi TT, N/A, at Upper Radiator Hose to Thermostat Hose
  • Fits 2006-2008 Audi A3, N/A, at Upper Radiator Hose to Thermostat Hose
  • Fits 2007-2009 Volkswagen Eos, N/A, 2.0L; at Upper Radiator Hose to Thermostat Hose
  • Fits 2006-2008 Volkswagen GTI, N/A, at Upper Radiator Hose to Thermostat Hose
  • Fits 2006-2008 Volkswagen Jetta, N/A, 2.0L; at Upper Radiator Hose to Thermostat Hose
  • Fits 2006-2008 Volkswagen Passat, N/A, 2.0L; at Upper Radiator Hose to Thermostat Hose

What It Helps Address

  • Cracked or leaking coolant tee at the hose junction
  • Coolant seepage near the upper radiator hose connection
  • Loss of coolant flow integrity in the thermostat hose branch
  • Cooling system service needs on Audi TT Quattro and Volkswagen 2.0L applications

Installation Notes

Verify the part number 1K0121087H and match the vehicle year, make, model, engine, and hose routing before installation. Confirm the connection point at the upper radiator hose to thermostat hose junction on Audi TT Quattro, Audi TT, Audi A3, Volkswagen Eos, Volkswagen GTI, Volkswagen Jetta, and Volkswagen Passat applications.

Quality Assurance

Genuine OE-style replacement part for the specified cooling system application. Part number 1K0121087H is intended for direct replacement use on listed Audi and Volkswagen vehicles.

This part fits 28 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2015AudiTT Quattro———N/Aat Upper Radiator Hose to Thermostat Hose
2014AudiTT Quattro———N/Aat Upper Radiator Hose to Thermostat Hose
2013AudiTT QuattroS——N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2012AudiTT QuattroS——N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2011AudiTT Quattro———N/Aat Upper Radiator Hose to Thermostat Hose
2010AudiTT Quattro———N/Aat Upper Radiator Hose to Thermostat Hose
2009AudiTT———N/Aat Upper Radiator Hose to Thermostat Hose
2009AudiTT Quattro———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2009VolkswagenEos———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2008AudiA3———N/Aat Upper Radiator Hose to Thermostat Hose
2008AudiTT———N/Aat Upper Radiator Hose to Thermostat Hose
2008VolkswagenEos———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2008VolkswagenGTI———N/Aat Upper Radiator Hose to Thermostat Hose
2008VolkswagenJetta———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2008VolkswagenPassat———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2007AudiA3———N/Aat Upper Radiator Hose to Thermostat Hose
2007VolkswagenEos———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2007VolkswagenGTI———N/Aat Upper Radiator Hose to Thermostat Hose
2007VolkswagenJetta———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2007VolkswagenJetta—2.0LL4N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2007VolkswagenPassat———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2007VolkswagenPassat—2.0LL4N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2006AudiA3———N/Aat Upper Radiator Hose to Thermostat Hose
2006VolkswagenGTI———N/Aat Upper Radiator Hose to Thermostat Hose
2006VolkswagenJetta———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2006VolkswagenJetta—2.0LL4N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2006VolkswagenPassat———N/A2.0L; at Upper Radiator Hose to Thermostat Hose
2006VolkswagenPassat—2.0LL4N/A2.0L; at Upper Radiator Hose to Thermostat Hose