How to disconnect the cable from the negative battery terminal and replace the thermostat on 2006 Mazda 6?

Disconnect the negative battery terminal and drain the cooling system, saving good coolant. Follow the lower radiator hose, loosen the clamp and detach or cut the hose if deteriorated. Replace corroded thermostat housing, remove associated components as needed, replace thermostat and gasket, reinstall hoses, refill, bleed, and check for leaks.

Genuine 2006 Mazda 6 Thermostat

Engine Coolant Thermostat

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3 Thermostats found

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2006 Mazda 6 Thermostat Part Number: L336-15-170
$42.59 MSRP: $56.79
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Product Specifications
- Other Name: Thermostat & Cover; Cover, Thermostat, Thermostat Housing, Water Inlet
- Replaces: L328-15-170A, L327-15-170, L327-15-170A, L327-15-171, L328-15-170B, ZZCA-15-172, ZZCA-15-172A, LFE2-15-170
- Item Weight: 1.20 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L336-15-170
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
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Fits the following 2006 Mazda 6 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
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2006 Mazda 6 Thermostat Part Number: AJ57-15-171A
Product Specifications
- Replaces: AJ57-15-171
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: AJ57-15-171A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 2006 Mazda 6 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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2006 Mazda 6 Thermostat Part Number: GY01-15-171
Product Specifications
- Other Name: Thermostat, No Gasket
- Replaces: AJ03-15-17X, AJ51-15-17X
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: GY01-15-171
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
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Fits the following 2006 Mazda 6 Submodels:
- S | 6 Cyl 3.0 L GAS

2006 Mazda 6 Thermostat Parts and Q&A

Q: How to disconnect the cable from the negative battery terminal and replace the thermostat on 2006 Mazda 6?
A: Disconnect the negative battery terminal and drain the cooling system, saving good coolant. Follow the lower radiator hose, loosen the clamp and detach or cut the hose if deteriorated. Replace corroded thermostat housing, remove associated components as needed, replace thermostat and gasket, reinstall hoses, refill, bleed, and check for leaks.