How to remove and replace the heater core in an automotive HVAC system on Mazda 3?

Begin by having the air conditioning system discharged by an automotive air conditioning technician. Next, remove the battery cover and disconnect the cable from the negative battery terminal. Drain the cooling system, then disconnect the heater hoses from the heater core inlet and outlet pipes at the firewall, along with the two refrigerant pipes. Tag and disconnect the cables and electrical connectors from the HVAC unit, and remove the mounting fasteners from the firewall side of the engine compartment. Remove the instrument panel and HVAC unit as an assembly, and take off the lower cowl grille panel to access some HVAC unit fasteners. Remove the HVAC unit-to-instrument panel mounting fasteners and separate the unit from the instrument panel. The heater core is located in the front lower center section of the HVAC unit, below the blower motor housing; remove the heater core cover screws and pull the heater core out of the housing. Installation is the reverse of removal, ensuring to reconnect the heater core inlet and outlet hoses at the firewall. Finally, refill the cooling system and have the system evacuated, recharged, and leak-tested by the shop that discharged it.

How to remove and install the heater core on Mazda B2200?

Installation and removal of heater in a pickup To install or remove the heater in a pickup, the first step would be to take out the heater out of the truck and then remove the five screws that are located between the halves of the case. Unscrew the hose clamps and pull the hose core out and then insert the replacement core and attach the core tube to the water valve tube using a short hose and clamps. Reassemble the halves of the case and reconnect with the screws and replace the heater and ensure that it is operating properly. To access the front of an MPV, empty the engine cooling system, disassemble the instrument panel, disconnect the heater hoses, unbolt the instrument panel support, support the heater case and unscrew the mounting nut. Lift the case carefully, being careful not to spill the coolant in the core, and then lift out the heater core. Installation is done in the reverse, at which time the new sealer is used and the cooling system is refilled, and leakages are checked. To remove the rear, loosen battery ground, switch the rear heater temperature controller to warm, empty the engine coolant, disassemble the driver seat, disconnect the heater hoses and the wiring, and loosen the mounting bolts of the heater case in order to lift it out. Removing the core is as simple as separating the halves of the cases and install is likewise as simple, replacing any damaged sealer. Navajo Disconnection of the negative battery cable should be done as the engine cools down and coolant should be emptied but it should be in a sealable container. Unscrew the heater hoses in the core tubes and plug them in, disassemble the screws holding the heater core access cover to the plenum assembly and detach the cover. To take out the heater core pull it out of the back and downwards then insert the new core and seal in the plenum, reconnect the access cover and replace the hoses without over-tightening. Lastly, verify the amount of coolant in the system, release the negative battery cable, boot the engine, and check whether it has leakages.

Genuine Mazda Heater Core

HVAC Heater Core

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54 Heater Cores found

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Mazda Heater Core Part Number: DN4K-61-J24
$663.88 MSRP: $907.11
You Save: $243.23 (27%)
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Product Specifications
- Other Name: Cabin-Condenser; Heater Core
Fits the following Mazda Models:
- MX-30 EV | 2022-2023 | Base, Premium Plus | BATTERY EV (EV/BEV)
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Mazda Heater Core Part Number: TK48-61-A10
$728.91 MSRP: $995.99
You Save: $267.08 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: TD11-61-A08
$813.94 MSRP: $1112.15
You Save: $298.21 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- CX-9 | 2007-2015 | Grand Touring, Sport, Touring | 6 Cyl 3.5 L GAS, 6 Cyl 3.7 L GAS
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Mazda Heater Core Part Number: VA54-61-A10
$56.98 MSRP: $75.99
You Save: $19.01 (26%)
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Product Specifications
- Other Name: Core, Heater Unit; Heater Core
Fits the following Mazda Models:
- CX-50 | 2023-2024 | 2.5 S, 2.5 Turbo | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: NA1P-61-A10
$110.90 MSRP: $147.89
You Save: $36.99 (26%)
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- MX-5 Miata | 2016-2023 | 100th Anniversary Special Edition, Club, Grand Touring, RF 100th Anniversary Special Edition, RF Club, RF Grand Touring, Sport | 4 Cyl 2.0 L GAS
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Mazda Heater Core Part Number: BFWM-61-A10
$107.60 MSRP: $143.50
You Save: $35.90 (26%)
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Product Specifications
- Other Name: Core, Heater Unit; Heater Core
Fits the following Mazda Models:
- 3 | 2022-2024 | 2.5 Carbon Turbo, 2.5 Turbo, 2.5 Turbo Premium Plus | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: DEKK-61-A10
$139.71 MSRP: $186.32
You Save: $46.61 (26%)
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Product Specifications
- Other Name: Core, Heater Unit; Heater Core
Fits the following Mazda Models:
- CX-30 | 2021-2023 | 2.5 Turbo | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: BDTS-61-A10
$179.43 MSRP: $239.28
You Save: $59.85 (26%)
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Product Specifications
- Other Name: Core, Heater Unit; Heater Core
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- CX-30 | 2020-2023 | 2.5 S, 2.5 S Carbon Edition, Base, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: GS3L-61-A10
$217.33 MSRP: $289.82
You Save: $72.49 (26%)
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- 6 | 2009-2013 | i, S | 4 Cyl 2.5 L GAS, 6 Cyl 3.7 L GAS
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Mazda Heater Core Part Number: DD2F-61-A10
$240.45 MSRP: $320.67
You Save: $80.22 (26%)
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- CX-3 | 2016-2021 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
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Mazda Heater Core Part Number: NE51-61-A10
$254.85 MSRP: $339.88
You Save: $85.03 (26%)
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- MX-5 Miata | 2006-2015 | 25th Anniversary Edition, Base, Club, Club Spec, Grand Touring, Special Edition, Sport, SV, Touring | 4 Cyl 2.0 L GAS
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Mazda Heater Core Part Number: DF71-61-A10
$248.73 MSRP: $331.70
You Save: $82.97 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- 2 | 2011-2014 | Sport, Touring | 4 Cyl 1.5 L GAS
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Mazda Core Part Number: B25D-61-A10
$259.29 MSRP: $345.79
You Save: $86.50 (26%)
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Product Specifications
- Other Name: Core, Heater Unit; Core
Fits the following Mazda Models:
- Protege | 1999-2000 | DX, ES, LX | 4 Cyl 1.6 L GAS, 4 Cyl 1.8 L GAS
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Mazda Heater Core Part Number: BJS7-61-A10A
$277.00 MSRP: $369.40
You Save: $92.40 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
- Replaces: BJS7-61-A10
Fits the following Mazda Models:
- 3 | 2014-2018 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: BP4K-61-A10
$294.11 MSRP: $392.23
You Save: $98.12 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- 3 | 2004-2008 | i, Mazdaspeed, S, SP23 | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
- 5 | 2006 | Sport, Touring | 4 Cyl 2.3 L GAS
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Mazda Heater Core Part Number: BBM4-61-A10
$335.11 MSRP: $446.90
You Save: $111.79 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- 3 | 2012-2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: BDGF-61-A10
$359.55 MSRP: $479.50
You Save: $119.95 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Unit; Heater Core
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: BBM5-61-A10
$397.49 MSRP: $534.37
You Save: $136.88 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core, Heater Unit
Fits the following Mazda Models:
- 3 | 2010-2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: TK48-61-D10
$402.86 MSRP: $541.58
You Save: $138.72 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core, Heater Unit-Rear
Fits the following Mazda Models:
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
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Mazda Heater Core Part Number: TD11-61-D10A
Product Specifications
- Other Name: Core, Heater Unit-Rear
Fits the following Mazda Models:
- CX-9 | 2007-2015 | Grand Touring, Sport, Touring | 6 Cyl 3.5 L GAS, 6 Cyl 3.7 L GAS

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1-20 of 54 Results

Mazda Heater Core

Mazda Heater Core efficiently turns leftover engine heat into cozy cabin warmth, keeping every ride comfortable when temperatures drop. Mazda vehicles stand out for crisp handling, sleek Kodo styling, and innovative Skyactiv technology that squeezes more power from every drop of fuel while keeping emissions low. Mazda also packs i-Activsense safety features such as radar cruise and lane-keep alerts, and it experiments with mild hybrids and electric drive to future-proof its lineup. Spirited steering response and carefully tuned suspensions give Mazda drivers a grin on winding roads, and available i-Activ AWD adds confidence on rough or slippery surfaces, proving that practicality and fun can share one driveway. The Heater Core itself sits under the dashboard like a compact radiator, fed with hot coolant that flows through finned tubes, while the blower fan pushes air across those fins so warm air streams through the vents almost instantly. Mazda pairs this Heater Core with smart airflow doors or precise coolant valves that let occupants dial in the exact temperature they want, and modern sensors help maintain clear windows and balanced humidity. Because it can bleed off excess heat, the unit even offers the engine a helpful secondary cooling path, making the Mazda Heater Core a small but vital partner in reliability and comfort.

You'll get great performance and real durability when you pick genuine OEM Heater Core. Mazda builds these using high-quality materials and official factory methods to ensure they hold up mile after mile. You deserve that Mazda reliability without the headache of cheap knockoffs. It is easy to find exactly what you need in our huge inventory of genuine parts. Plus, every OEM part carries a real manufacturer's warranty for your peace of mind. You will love our low prices too. Order today and we will ship your brand-new parts fast. They often reach your door in just a few days.

Mazda Heater Core Parts and Q&A

Heater Core
BP8P-61-A10
Q: How to remove and replace the heater core in an automotive HVAC system on Mazda 3?
A:
Begin by having the air conditioning system discharged by an automotive air conditioning technician. Next, remove the battery cover and disconnect the cable from the negative battery terminal. Drain the cooling system, then disconnect the heater hoses from the heater core inlet and outlet pipes at the firewall, along with the two refrigerant pipes. Tag and disconnect the cables and electrical connectors from the HVAC unit, and remove the mounting fasteners from the firewall side of the engine compartment. Remove the instrument panel and HVAC unit as an assembly, and take off the lower cowl grille panel to access some HVAC unit fasteners. Remove the HVAC unit-to-instrument panel mounting fasteners and separate the unit from the instrument panel. The heater core is located in the front lower center section of the HVAC unit, below the blower motor housing; remove the heater core cover screws and pull the heater core out of the housing. Installation is the reverse of removal, ensuring to reconnect the heater core inlet and outlet hoses at the firewall. Finally, refill the cooling system and have the system evacuated, recharged, and leak-tested by the shop that discharged it.
Core
UB39-61-A10
Q: How to remove and install the heater core on Mazda B2200?
A:
Installation and removal of heater in a pickup To install or remove the heater in a pickup, the first step would be to take out the heater out of the truck and then remove the five screws that are located between the halves of the case. Unscrew the hose clamps and pull the hose core out and then insert the replacement core and attach the core tube to the water valve tube using a short hose and clamps. Reassemble the halves of the case and reconnect with the screws and replace the heater and ensure that it is operating properly. To access the front of an MPV, empty the engine cooling system, disassemble the instrument panel, disconnect the heater hoses, unbolt the instrument panel support, support the heater case and unscrew the mounting nut. Lift the case carefully, being careful not to spill the coolant in the core, and then lift out the heater core. Installation is done in the reverse, at which time the new sealer is used and the cooling system is refilled, and leakages are checked. To remove the rear, loosen battery ground, switch the rear heater temperature controller to warm, empty the engine coolant, disassemble the driver seat, disconnect the heater hoses and the wiring, and loosen the mounting bolts of the heater case in order to lift it out. Removing the core is as simple as separating the halves of the cases and install is likewise as simple, replacing any damaged sealer. Navajo Disconnection of the negative battery cable should be done as the engine cools down and coolant should be emptied but it should be in a sealable container. Unscrew the heater hoses in the core tubes and plug them in, disassemble the screws holding the heater core access cover to the plenum assembly and detach the cover. To take out the heater core pull it out of the back and downwards then insert the new core and seal in the plenum, reconnect the access cover and replace the hoses without over-tightening. Lastly, verify the amount of coolant in the system, release the negative battery cable, boot the engine, and check whether it has leakages.