【Ensures Precise Cabin Temperature Control】​ This heater control solenoid valve is essential for regulating the flow of hot coolant to your vehicle's heater core, ensuring accurate and responsive cabin temperature adjustment. It provides consistent heating for passenger comfort and efficient defrosting capabilities by controlling coolant flow based on your climate control settings. 【Guaranteed OEM Fit & Direct Replacement】​ Engineered as an exact replacement for OEM part numbers 4H0-121-671-B​ and 4H0-121-671-D. This solenoid valve also seamlessly replaces 1J0-973-702, ensuring a perfect fit, correct electrical connections, and reliable performance that matches specifications for your vehicle's HVAC system. 【Specific Audi & Volkswagen Model Compatibility】​ Designed for a wide range of Audi and Volkswagen models​ including Audi A3/A4/A5/A6/A7/A8/Q3/Q5/Q7/Q8/RS6/RS7 (2011-2020), Volkswagen Golf/GTI/Jetta/Tiguan/Atlas (2015-2022), and various other models. Please verify your vehicle's exact model, year, and trim to confirm compatibility before purchasing. 【Fast FBA】​ This item is by Amazon (FBA), qualifying for fast and often FREE options. Benefit from quick, hassle-free customer service from Amazon's network. 【Reliability Backed by 1-Year Warranty】​ We are confident in the quality and durability of our heater control solenoid valve. Your purchase is protected by a full 12-month warranty, ensuring long-term performance and your complete satisfaction.

Replace Part Number: 

4H0-121-671-D

4H0-121-671-B

4H0121671D

4H0121671B

1J0-973-702

1J0973702

Compatible with The Following Vehicles: 

Compatible with Volkswagen: 

Atlas 2018-2022

Atlas Cross Sport 2020-2022

Golf 2015-2018

Golf Alltrack 2017-2019

Golf R 2015-2019

Golf SportWagen 2015-2019

Golf GTI 2015-2021

Jetta 2019-2021

Tiguan 2018-2022

Compatible with Audi: 

A3 2015-2020

A3 Quattro 2015-2019

A4 2018-2019

A4 allroad 2018-2019

A4 Quattro 2018-2019

A5 Quattro 2018-2020

A5 Sportback 2018-2020

A6 2012-2018

A6 Quattro 2012-2018

A7 Quattro 2014-2018

A8 Quattro 2011-2020

allroad 2013-2016

Q3 2015-2018

Q3 Quattro 2015-2018

Q5 2013-2019

Q7 2013-2020

Q8 2019-2020

RS7 2014-2018

S3 2015-2020

S6 2013-2018

S7 2013-2018

S8 2013-2020

TT Quattro 2016-2019

TTS Quattro 2016-2018