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Four Seasons 86366 Engine Coolant Thermostat Housing Assembly
| Brand | Four Seasons 86366 |
|---|---|
| Description | Engine coolant components |
| Gasket or Seal Included | Yes |
| Inlet Dia. IN | 2.32 |
| Material | Plastic |
| Mnt Flange Width IN | 0.6 |
| Overall Height IN | 4.17 |
| Style | W/ actuator |
| Thermostat Included? | Not included |
| Type | Thermal management module |
| Product line | Thermal Module |
| Fits | Mazda · 24 vehicles |
Thermal Module line. Engineered for coolant-system service with tested, dependable operation.
Sealing included. Gasket or seal is included for a cleaner housing-to-engine interface.
Actuator style. Built as a thermal management module with a plastic housing.
Cross-references Focus Auto Parts 86366, Motorad TA9249 and PYFB1516ZA for the same application. See all 5.
Thermal Module Overview
The Four Seasons 86366 engine coolant thermostat housing assembly is a thermal management module built with a plastic housing and an included gasket or seal. It is listed for Mazda thermal module applications and does not include a thermostat.
Fits 2018-2021 Mazda 6, N/A. Fits 2019-2025 Mazda CX-5, N/A. Fits 2019-2021 Mazda CX-3, N/A. Fits 2019-2022 Mazda 3, N/A. Fits 2020-2023 Mazda CX-30, N/A. Fits 2024-2025 Mazda 3, N/A.
Key Features
- Plastic housing construction for thermal management applications
- Gasket or seal included for a cleaner sealing interface
- Actuator-style assembly
- Thermostat not included
- Four Seasons Thermal Module product line
Detailed Description
Four Seasons part 86366 is an engine coolant thermostat housing assembly used in thermal module applications across select Mazda vehicles. The assembly uses a plastic body, measures 2.32 inches at the inlet, and has an overall height of 4.17 inches with a 0.6-inch mounting flange width. Because the thermostat is not included, this housing is suited for service work where the housing and sealing components are being replaced separately. This part cross-references Motorad TA9249 and Focus Auto Parts 86366 for the same application.
The Thermal Module line focuses on coolant-system components that are engineered and tested for dependable operation. For buyers searching for a Mazda 3 thermostat housing assembly, Mazda CX-5 coolant thermostat housing, or Mazda CX-30 thermal module replacement, part number 86366 provides a direct reference point for the correct application.
Common Replacement Issues
- Coolant leaks at the thermostat housing or seal interface
- Cracked or warped plastic housing
- Improper coolant flow control from a worn thermal module assembly
- Service needs where the thermostat remains in place separately
Installation Notes
Verify the inlet diameter, mounting flange width, and overall height before installation. Confirm the vehicle’s thermal module configuration and reuse only components that are still serviceable. Replace the sealing surface as needed and follow the manufacturer’s cooling-system service procedure.
Quality Assurance
Four Seasons states that its products are engineered and tested for trouble-free operation, backed by more than 50 years of mobile A/C experience. Use part number 86366 to confirm the correct Mazda application before installation.
| Year | Make | Model | Transmission | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 2025 | Mazda | 3 | — | — | — | Thermal Module |
| 2025 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2024 | Mazda | 3 | — | 2.5L | L4 | Thermal Module |
| 2024 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2023 | Mazda | CX-30 | — | 2.5L | L4 | Thermal Module |
| 2023 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2022 | Mazda | 3 | — | 2.0L | L4 | Thermal Module |
| 2022 | Mazda | CX-30 | — | 2.5L | L4 | Thermal Module |
| 2022 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2021 | Mazda | 3 | — | 2.0L | L4 | Thermal Module |
| 2021 | Mazda | 6 | — | — | — | Thermal Module |
| 2021 | Mazda | CX-3 | — | — | — | Thermal Module |
| 2021 | Mazda | CX-30 | — | 2.5L | L4 | Thermal Module |
| 2021 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2020 | Mazda | 3 | Automatic | — | — | Thermal Module |
| 2020 | Mazda | 6 | — | — | — | Thermal Module |
| 2020 | Mazda | CX-3 | — | — | — | Thermal Module |
| 2020 | Mazda | CX-30 | — | — | — | Thermal Module |
| 2020 | Mazda | CX-5 | — | — | — | Thermal Module |
| 2019 | Mazda | 3 | Automatic | — | — | Thermal Module |
| 2019 | Mazda | 6 | — | — | — | Thermal Module |
| 2019 | Mazda | CX-3 | — | — | — | Thermal Module |
| 2019 | Mazda | CX-5 | — | 2.5L | L4 | Thermal Module |
| 2018 | Mazda | 6 | — | — | — | Thermal Module |
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