Valeo 715303 HVAC Heater Core

HVAC Heater Core for Audi and Volkswagen

The Valeo HVAC Heater Core, part number 715303, restores heat transfer inside the vehicle climate system by moving warmth from engine coolant into the air delivered through the blower. It is a direct-fit heating component for select Audi A3, S3, and Volkswagen Golf-family applications.

Built by Valeo, a supplier with OE-level manufacturing experience, this heater core is engineered for the HVAC system used in 2015-2018 Audi A3, 2015-2018 Volkswagen Golf, and related platform vehicles. This part cross-references 5Q0819031 and 5Q0819031B for the same application.

Key Features

• HVAC heater core for cabin heat output
• Transfers heat from engine coolant to blower air through metal fins
• OE-style replacement for select Audi and Volkswagen models
• Valeo part number 715303
• Fits multiple MQB-platform vehicles across 2015-2018 model years

Fitment

• Fits 2015-2018 Audi A3, HVAC Heater Core
• Fits 2015-2018 Audi A3 Quattro, HVAC Heater Core
• Fits 2016-2018 Audi A3 Sportback e-tron, HVAC Heater Core
• Fits 2015-2018 Audi S3, HVAC Heater Core
• Fits 2015-2018 Volkswagen e-Golf, HVAC Heater Core
• Fits 2015-2018 Volkswagen Golf, HVAC Heater Core
• Fits 2017-2018 Volkswagen Golf Alltrack, HVAC Heater Core
• Fits 2015-2018 Volkswagen Golf R, HVAC Heater Core
• Fits 2015-2018 Volkswagen Golf SportWagen, HVAC Heater Core
• Fits 2015-2018 Volkswagen GTI, HVAC Heater Core
• Fits 2018 Volkswagen Tiguan, HVAC Heater Core

What It Helps Address

• Weak or inconsistent cabin heat
• Restricted heat transfer inside the HVAC system
• Loss of warm air output from the vents
• Replacement needs after heater core leakage or internal blockage
• Restoration of heating performance in Audi A3 and Volkswagen Golf applications

Installation Notes

Verify vehicle fitment by year, make, and model before installation. This heater core is located inside the HVAC assembly, so access typically requires removal of interior trim and HVAC components. Confirm coolant system condition and inspect related hoses, seals, and connections during service.

Quality Assurance

Valeo manufactures HVAC components with the same engineering team trusted by major vehicle manufacturers worldwide. Part number 715303 is built for the specified Audi and Volkswagen applications and cross-references OE numbers 5Q0819031 and 5Q0819031B.