How to remove and replace the Heater Core on Audi A6?

Take the power seats all the way back and open the engine hood, pulling off the rubber molding at the rear bulkhead of the engine compartment. To remove the plenum chamber cover, pull it forwards, then disconnect the battery cables and remove the battery. In the 1998 model, take away the entire windscreen wiper assembly. Remove the insulating grommet in the plenum chamber and loosen or remove screw by 10 mm. To relieve pressure from the cooling system, loosen the cap on the coolant reservoir. Next, clamp off the heater core hoses with coolant hose pinch-off clamps and disconnect both hoses marking them for correct reattachment. To begin, place your bucket underneath the connection to the heater core. Using compressed air, blow out any coolant present. Finally, remove the rubber grommet. In the passenger compartment of the car, the steering column is tilted down; the trim that is under the instrument cluster is removed, then the fasteners of the steering column trim panel, plus the lower trim; then you will be able to reach the left side of the evaporator housing. To detach the heater core, you need to unscrew the screw and remove the bracket, loosen the clamps, and pull out the heater core slightly from the evaporator housing followed by disconnecting the coolant lines. In case the brake pedal mounting bracket interferes, strip off the dashboard end covers and back off the dashboard cross brace mounting fasteners to allow sufficient movement to remove the heater core. After installation, the reverse procedure will take place. Be sure to replace heater core hose clamps and O-rings for seals. Do not thread hose clamps against the evaporator housing. Fill and bleed the cooling system while checking for leaks.

Genuine Audi A6 Heater Core

HVAC Heater Core

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8 Heater Cores found

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Audi A6 Heater Core Part Number: 4B1-819-031-C
$220.15 MSRP: $308.33
You Save: $88.18 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1999-2004 Audi A6 | Base | 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS
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Audi A6 Heater Core Part Number: 8D1-819-030-B
$222.52 MSRP: $311.65
You Save: $89.13 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core
- Replaces: 8D1-819-030-A
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1995-1997 Audi A6 | Avant, Base | 6 Cyl 2.8 L GAS
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Audi A6 Heater Core Part Number: 420-898-037-A
$324.26 MSRP: $454.15
You Save: $129.89 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 4F0-820-031-D
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2007-2011 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Heater Core Part Number: 4H0-898-037
$460.53 MSRP: $644.99
You Save: $184.46 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2018 Audi A6 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS
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Audi A6 Heater Core Part Number: 4B1-819-031
$208.49 MSRP: $292.00
You Save: $83.51 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1998-1999 Audi A6 | Base | 6 Cyl 2.8 L GAS
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Audi A6 Heater Core Part Number: 4F0-820-031-C
$240.38 MSRP: $336.67
You Save: $96.29 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 4F0-820-031-A
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2008 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Heater Core Part Number: 4F0-819-011
$520.61 MSRP: $729.15
You Save: $208.54 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Heater
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2011 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Heater Core Part Number: 443-819-030
$113.05 MSRP: $158.33
You Save: $45.28 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1995-1998 Audi A6 | Avant, Base | 6 Cyl 2.8 L GAS

Audi A6 Heater Core

The Audi A6 Heater Core provides on-demand, uniformly spread warmth to the cabin, plus quick windshield defrost that not only offers the driver comfort but also a clear view even on the cold mornings. Constructed like a miniature radiator using light but resilient aluminum, this Heater Core directs hot engine coolant to flow into tightly sealed tubes, and then transfers the heat to air flowing through the cabin via the cabin fan. Close attention to Audi craftsmanship guarantees corrosion-resistant fins and solid joints that survive thousands of temperature changes, giving the part a strong reputation to last long. Throughout the generations of the A6, from the classic C4 saloon to the advanced C8, the unit has the same mounting points and hose size, meaning that it can be installed into the vehicle without any compatibility issues. Audi owners can upgrade or restore without concerns of incompatibility. Dual zone climate systems include sensor-controlled blend doors allowing each front occupant to set a custom temperature after the air runs through the Heater Core, and strip moisture that might fog up the glass. The part also serves as a mini radiator, expelling unwanted heat when traffic is at a crawl, an attribute that keeps the cooling system in equilibrium and enhances efficiency. Since an operating Heater Core directs warm dry air directly over the defroster vents, clear glass appears rather fast, and this contributes to safety on cold and wet days, or in case of rain, sleet or snow. Routine coolant-based flushes as recommended by Audi will help avoid clogging and electrolysis and maintain constant performance while keeping dashboard surgery at a distance. The climate system is backed by smart electronics that are common throughout the greater A6 range, responding within seconds to driver inputs and demonstrating the characteristic quiet precision that makes Audi stand out from typical brands.

Choose original equipment manufacturer Heater Core for great performance and strong durability. They use Audi's official craftsmanship and high-grade materials, and meet strict quality standards. Are you looking for quality Heater Core at a good price? Come to our online store. We carry a wide range of genuine parts for your Audi A6 and the prices are competitive. Each part comes with the manufacturer's warranty. You can install with confidence and get steady results. Over time, you'll save money and avoid hassle. Keep your maintenance simple and protect your vehicle with OEM parts. Get the quality your A6 needs now.

Audi A6 Heater Core Parts and Q&A

Heater Core
4B1-819-031
Q: How to remove and replace the Heater Core on Audi A6?
A:
Take the power seats all the way back and open the engine hood, pulling off the rubber molding at the rear bulkhead of the engine compartment. To remove the plenum chamber cover, pull it forwards, then disconnect the battery cables and remove the battery. In the 1998 model, take away the entire windscreen wiper assembly. Remove the insulating grommet in the plenum chamber and loosen or remove screw by 10 mm. To relieve pressure from the cooling system, loosen the cap on the coolant reservoir. Next, clamp off the heater core hoses with coolant hose pinch-off clamps and disconnect both hoses marking them for correct reattachment. To begin, place your bucket underneath the connection to the heater core. Using compressed air, blow out any coolant present. Finally, remove the rubber grommet. In the passenger compartment of the car, the steering column is tilted down; the trim that is under the instrument cluster is removed, then the fasteners of the steering column trim panel, plus the lower trim; then you will be able to reach the left side of the evaporator housing. To detach the heater core, you need to unscrew the screw and remove the bracket, loosen the clamps, and pull out the heater core slightly from the evaporator housing followed by disconnecting the coolant lines. In case the brake pedal mounting bracket interferes, strip off the dashboard end covers and back off the dashboard cross brace mounting fasteners to allow sufficient movement to remove the heater core. After installation, the reverse procedure will take place. Be sure to replace heater core hose clamps and O-rings for seals. Do not thread hose clamps against the evaporator housing. Fill and bleed the cooling system while checking for leaks.