Mazda Thermostats

Filter

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 Gasket

Part Number: P5SP-15-173A
Mazda Mazda
Notes: Included with thermostat cover. Included with thermostat housing.
Applications: 2.5L W/O TURBO.
Other Names: Thermostat Cover Gasket, Gasket Thermostat
Description: Mazda3. CX-30. Without 2.5L turbo, 2023-25. 2.5L non turbo, with i-stop, 2024-25.
MSRP $4.97
$3.64

Thermostat Housing

Part Number: JE48-15-172
Mazda Mazda
Other Names: Cover, Thermo
Description: 929. Dohc. Lower.
MSRP $37.18
$26.76

Thermostat Housing

Part Number: KL01-15-172
Mazda Mazda
Other Names: Thermostat Cover, Cover Thermo
Description: 2.5L. 626, MX-6. Without turbo. All. 6 cyl. MX-3. 1.8l.
MSRP $36.18
$26.04

Thermostat Cover

Part Number: N3H1-15-170C
Mazda Mazda
Other Names: Water Outlet, Cover Thermostat
Replaces: n3h115170a, n3h115170b
Description: RX-8.
MSRP $90.09
$63.77

Thermostat Housing

Part Number: ZZJ1-15-172
Mazda Mazda
Notes: Includes Water Outlet, Thermostat And Gasket.
Applications: 3.7L (2011-13). 3.7L (2009-10).
Other Names: Thermostat Unit, Cover Thermo
Replaces: ca0115170a, ca6915170
Description: Mazda6. 3.7L, 2011-13. 3.7L, 2009-2010.
MSRP $331.61
$228.77

Thermostat Housing

Part Number: F201-15-172B
Mazda Mazda
Other Names: Engine Coolant Thermostat Housing, Cover Thermo
Replaces: f20115172a
Description: Without turbo. Manual trans. 626 & MX-6.
MSRP $34.45
$24.79

Thermostat Housing

Part Number: 1F73-15-172
Mazda Mazda
Other Names: Thermostat Cover
Replaces: 1f2215172, 1f2215172a
Description: 4.0L, 2001-09.
MSRP $48.96
$35.24

Thermostat Set

Part Number: HE41-99-152D
Mazda Mazda
Replaces: 22315171d, he4115171, he4199152, he4199152a, he4199152c
MSRP $31.69
$22.81

Thermostat Housing

Part Number: 1F20-15-172
Mazda Mazda
Other Names: Cover Thermo
Description: B2300.
MSRP $161.58
$112.44

Thermostat Housing

Part Number: KJ01-15-170
Mazda Mazda
Other Names: Case Thermostat
Description: 2.3L.
MSRP $171.31
$119.20

Thermostat Seal

Part Number: 9XG0-03-19X0
Mazda Mazda
Other Names: Ring O
Description: 2.0L.
MSRP $4.06
$2.98

Thermostat Housing

Part Number: F202-15-172B
Mazda Mazda
Other Names: Engine Coolant Thermostat Housing, Cover Thermo
Replaces: f20215172a
Description: Auto trans. 626 & MX-6. With turbo.
$4.04

No results found for "thermostat". Here are some helpful search tips:

  • Search by a part name. Example: water pump.
  • Be less specific. Example: brake instead of ceramic brake.
  • Remove information such as make, year or model.
  • Can't find the part you are looking for? Contact us and we'll find it for you!