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.

Engine Coolant Thermostat

Part Number: BP6F-15-171A
Mazda Mazda
Other Names: Thermostat, Thermostat(W O Gasket)
Replaces: 8abe15171, bp6f15171
Description: Miata mx5. Protege. 1.6l. From 04/12/1995.
MSRP $48.62
$35.00

Thermostat Unit Bolt

Part Number: 9XF0-32-797L
Mazda Mazda
Other Names: Engine Intake Manifold Bolt, Bolt Washer
Description: All Required. 3.7L, 2011-13, #1. 3.7L, 2009-2010, #1.
MSRP $2.82
$2.06

Engine Coolant Thermostat

Part Number: AJ57-15-171A
Mazda Mazda
Notes: Included with thermostat cover.
Applications: 3.0L.
Other Names: Thermostat Housing, Thermostat
Replaces: aj5715171
Description: Thermostat. 2002-06. Tribute. 3.0l.
MSRP $15.46
$11.32

Engine Coolant Thermostat

Part Number: 8AB8-15-171-9U
Mazda Mazda
Other Names: Thermostat
Replaces: 8ab815171, bp0515171
Description: Incl.Gasket. Protege. Miata mx5. From 02/01/1991. MX-3. 1.6l.
MSRP $40.19
$28.93

Engine Coolant Thermostat

Part Number: 8ABB-15-171-9U
Mazda Mazda
Other Names: Thermostat, Thermostat Set
Replaces: 8abb15171, 8abb15171a, 8ag415171
Description: B2200. 626 & MX-6. Gas. B2000.
MSRP $27.77
$19.99

Thermostat Housing O-Ring

Part Number: CWJ1-15-173
Mazda Mazda
Notes: Included with thermostat housing. Part cannot be reused/reinstalled.
Applications: 2.5L W/HYBRID.
Other Names: Thermostat Gasket, Engine Coolant Thermostat Gasket, HVAC Heater Hose O-Ring, Gasket Water Inlet Housi
Description: CX-50. 2.5L hybrid reservoir & hoses.
MSRP $15.35
$11.24

Thermostat Unit Gasket

Part Number: ZZJ1-15-592
Mazda Mazda
Notes: Included with thermostat unit.
Applications: 3.7L (2011-13). 3.7L (2009-10).
Other Names: Thermostat O-Ring, Housing Gasket, Ring O Water Outlet
Replaces: ca1915174, ca6015174
Description: Mazda6.
MSRP $15.15
$11.09

Thermostat Housing Gasket

Part Number: N3H1-10-153
Mazda Mazda
Other Names: Gasket
Description: RX-8.
MSRP $8.12
$5.94

Engine Coolant Thermostat

Part Number: PX8E-15-171
Mazda Mazda
Applications: 2.5L W/O TURBO.
Other Names: Thermostat
Description: 2.5L. CX-50. Incl.Gasket.
MSRP $36.67
$26.40

Thermostat Unit Bolt

Part Number: CA09-15-182A
Mazda Mazda
Notes: Included with outlet hose.
Other Names: Outlet Hose Clamp, Clamp Water Hose
Replaces: ca0915182
Description: 3.7L, 2009-2010, #2.
MSRP $6.87
$5.03

Engine Coolant Thermostat

Part Number: 8AK1-15-171-9U
Mazda Mazda
Other Names: Thermostat, Thermostat ( W O Gasket )
Replaces: f20115171a
Description: 323, Protege. Sohc. Gas. 626, MX-6. Miata mx5. MX-3. 1.6l.
MSRP $30.27
$21.79

Engine Coolant Thermostat

Part Number: P501-15-171
Mazda Mazda
Other Names: Thermostat
Description: Mazda3. Mexico built. To 08/04/2015.
MSRP $37.87
$27.26

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