OE Quality
60-Day Returns

Four Seasons 85902 HVAC Heater Hose Connector
Overview of Four Seasons Coolant Coupling 85902
The Four Seasons Coolant Coupling 85902 is designed specifically for Mazda 6 models, providing a reliable connection within the engine coolant system. Manufactured from durable plastic, this HVAC heater hose connector ensures proper coolant flow without including a thermostat or gasket.
- Constructed from high-quality plastic material
- Compatible with Mazda 6 vehicles
- Inlet diameter of 0.754 inches for precise fit
- Maximum height of 3.000 inches
- Meets or exceeds OEM specifications
- Does not include thermostat or gasket
- Part number 85902 for accurate identification
Detailed Product Description
The Four Seasons Coolant Coupling 85902 is an essential HVAC heater hose connector designed to maintain the integrity of the engine coolant system in Mazda 6 vehicles. This plastic coupling features an inlet diameter of 0.754 inches and a maximum height of 3.000 inches, ensuring a secure and precise fit. It is engineered without a thermostat and does not include a gasket or seal, making it suitable for applications where these components are not required. The part meets or exceeds OEM standards, providing dependable performance and compatibility with factory specifications.
About the Four Seasons Coolant Coupling Product Line
The Coolant Coupling line by Four Seasons focuses on engine coolant components that facilitate efficient coolant flow and system connectivity. This product line is designed to offer reliable replacements for HVAC heater hose connectors, ensuring proper fitment and durability. The 85902 coupling is part of this line, tailored to meet the specific requirements of Mazda 6 cooling systems without including additional components like thermostats or gaskets.
Common Applications and Issues Addressed
- Replacement of worn or damaged heater hose connectors in Mazda 6 coolant systems
- Resolving coolant leaks caused by cracked or broken couplings
- Maintaining proper coolant flow to prevent engine overheating
- Ensuring secure connections in HVAC heater hose assemblies
- Supporting system integrity after thermostat or gasket removal
Installation Notes and Tips
When installing the Four Seasons Coolant Coupling 85902, ensure the inlet diameter matches the hose size for a secure fit. Since this part does not include a gasket or thermostat, verify that these components are either not required or installed separately. Properly inspect the surrounding hoses and clamps for wear and replace as necessary to prevent leaks. Follow vehicle-specific service manual instructions for coolant system maintenance and coupling installation.
Quality Assurance and Warranty
This Four Seasons coolant coupling meets or exceeds OEM specifications, ensuring compatibility and reliable performance in Mazda 6 vehicles. While no specific warranty information is provided, Four Seasons products are generally manufactured to industry standards for durability and fitment. Always verify part number 85902 for correct application before installation.
| Brand | Four Seasons |
| Part Number | 85902 |
| Position | Coolant Coupling |
| Description | Engine Coolant Components |
| Gasket Or Seal Included | Not Included |
| Inlet Dia. IN | 0.754 |
| Material | Plastic |
| Maximum Height | 3.000 |
| Meets / Exceeds OEM? | Yes |
| Style | w/o Thermostat |
| Thermostat Included? | Not Included |
| Type | Coolant Coupling |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
| 2007 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
| 2006 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
| 2005 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
| 2004 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
| 2003 | Mazda | 6 | 3.0L | V6 | N/A | Coolant Coupling |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.