Mazda Thermostats

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Keep Your Engine Running Right with Genuine Mazda Thermostats

Maintaining the right engine temperature is key to keeping your Mazda performing as it should. The thermostat plays a crucial role in regulating coolant flow and ensuring smooth temperature transitions during every drive. Over time, even quality thermostats can wear out, leading to performance issues and overheating. At Cox Mazda, we offer genuine Mazda thermostats built to last longer and perform better than generic aftermarket alternatives.

Understand What a Thermostat Does

The thermostat controls the flow of coolant between the engine and radiator to maintain a consistent operating temperature. When the engine is cold, it keeps the coolant in place until the motor warms up, then gradually opens to prevent overheating. Vehicles like the Mazda CX-30 and Mazda6 rely on this small but essential part to balance heat and performance efficiently. Using a genuine Mazda thermostat ensures that your vehicle’s cooling system functions exactly as intended by the manufacturer.

Know Why Thermostats Wear Out

After thousands of heating and cooling cycles, thermostats can become stuck open or closed, disrupting temperature control. Corrosion, coolant contamination, or old age are common causes of failure. Cheaper aftermarket thermostats may not fit precisely or respond accurately to temperature changes, increasing the risk of overheating or poor fuel economy. Genuine Mazda replacements from Cox Mazda are engineered for exact fit and reliable performance under all driving conditions.

Replace at the Right Time

Signs such as erratic temperature readings or poor heater performance often indicate a thermostat problem. Replacing it before complete failure helps prevent costly engine damage and keeps your Mazda running efficiently. When replacing your thermostat, consider inspecting the water pump as well, since both parts work closely to regulate engine temperature. At Cox Mazda, we provide high-quality Mazda parts designed for precision, durability, and long-term dependability.

Thermostat

Part Number: AJ03-15-17X
Mazda Mazda
MSRP $7.18
$5.26

Thermostat

Part Number: 8AF1-15-171-9U
Mazda Mazda
Other Names: Thermostat Set
Replaces: 8af115171, 8af115171pt
Description: Rx7.
MSRP $26.75
$19.25

Thermostat

Part Number: 8AH1-15-171B-9U
Mazda Mazda
Other Names: Thermostat Set
Description: 929. 3.0l. MPV.
MSRP $37.02
$26.65

Thermostat

Part Number: PE01-15-171
Mazda Mazda
Description: CX-5. Mazda6. 2.5L. 2.0L skyactiv. Mazda3. Usa built. With skyactiv-g engine.
MSRP $37.79
$27.20

Thermostat

Part Number: ZZP3-15-171
Mazda Mazda
Replaces: zzm015171, zzm615171, zzp015171a
Description: 2.5L. B2500. B2300.
MSRP $14.37
$10.52

Thermostat Housing

Part Number: PXK7-15-172
Mazda Mazda
Applications: 2.5L.
Other Names: Thermostat Outlet, Cover Thermostat
Description: 2.5L. CX-90. CX-70.
MSRP $35.74
$25.73

Thermostat Housing

Part Number: SH01-15-172
Mazda Mazda
Notes: Included with Water pump assembly.
Applications: 2.2L Diesel.
Other Names: Thermostat Outlet, Cover Thermo
Description: CX-5. 2.2L diesel.
MSRP $60.67
$42.95

Thermostat Outlet

Part Number: PY8W-15-172
Mazda Mazda
Applications: 2.5L W/TURBO.
Other Names: Water Outlet, Thermostat Cover, Thermostat Housing, Thermostat, Cover Thermostat
Description: CX-9. Thermostat cover. CX-5. Japan built. Mazda3. Mexico built. With 2.5L turbo. CX-30. CX-50.
MSRP $40.59
$29.22

Thermostat Cover

Part Number: ZZC4-15-172
Mazda Mazda
Notes: Included with Water pump assembly.
Applications: 3.0L.
Other Names: Cover, Cover Thermostat
Description: Thermostat cover. Tribute. 3.0L.
$42.00

Thermostat Housing

Part Number: PYFB-15-19YE
Mazda Mazda
Applications: 2.5L W/O TURBO.
Other Names: Water Inlet Pipe, Engine Coolant Pipe, Water Valve, Connector Pipe, Engine Coolant Outlet Flange, Pipe Water
Replaces: pyfb1519yd
Description: Mexico built. Mazda3. Japan built. 2.5L non turbo 2018-25 without i-stop. Water inlet pipe. Without 2.5L turbo, 2020-22. CX-30. Auto...
MSRP $117.87
$82.02

Thermostat Housing

Part Number: JF01-15-176
Mazda Mazda
Other Names: Case Thermo
Description: 3.0l. Upper. 929. Sohc. MPV.
$32.49

Thermostat Housing

Part Number: AJ51-15-176B
Mazda Mazda
Notes: Included with thermostat unit.
Applications: 3.0L.
Other Names: Case Thermo
Replaces: aj5115176, aj5115176a
Description: Case. MPV. 2002-06. 3.0L. Tribute.
MSRP $123.60
$86.01

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