How to service and repair the heater core on 2003 Toyota Tacoma?

Service and repair the heater core by removing the heater unit followed by dismantling the heater radiator through removal of its 5 screws and 2 plates and clamp. Remove the heater radiator and then destroy the 2 screws and 2 clips so the pipes connecting to the heater radiator can be separated. The reassembly process should avoid using the two O-rings more than once. The installation process will establish the opposite sequence of removal steps.

OEM 2003 Toyota Tacoma Heater Core

HVAC Heater Core

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2003 Toyota Tacoma Heater Core
Part Number: 87107-35100
$345.82 MSRP: $506.81
You Save: $160.99 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Unit Sub-Assembly, Radiator; HVAC Heater Core; Unit Sub-Assembly, Heater Radiator
- Part Name Code: 87107A
- Item Weight: 4.60 Pounds
- Item Dimensions: 20.9 x 9.6 x 16.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 87107-35100
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2003 Toyota Tacoma Submodels:
- Base, Pre Runner, S-Runner | 4 Cyl 2.4 L GAS, 4 Cyl 2.7 L GAS, 6 Cyl 3.4 L GAS
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2003 Toyota Tacoma Heater Core
Part Number: 87107-0C010
$356.38 MSRP: $522.28
You Save: $165.90 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Unit Sub-Assembly, Radiator; HVAC Heater Core; Unit Sub-Assembly, Heater Radiator
- Part Name Code: 87107
- Item Weight: 2.50 Pounds
- Item Dimensions: 13.6 x 11.6 x 8.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 87107-0C010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2003 Toyota Tacoma Submodels:
- Base, Pre Runner, S-Runner | 4 Cyl 2.4 L GAS, 4 Cyl 2.7 L GAS, 6 Cyl 3.4 L GAS

2003 Toyota Tacoma Heater Core

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2003 Toyota Tacoma Heater Core Parts Q&A

Q: How to service and repair the heater core on 2003 Toyota Tacoma?
A: Service and repair the heater core by removing the heater unit followed by dismantling the heater radiator through removal of its 5 screws and 2 plates and clamp. Remove the heater radiator and then destroy the 2 screws and 2 clips so the pipes connecting to the heater radiator can be separated. The reassembly process should avoid using the two O-rings more than once. The installation process will establish the opposite sequence of removal steps.

Alternate Year Models

2002 Toyota Tacoma Heater Core 2004 Toyota Tacoma Heater Core