OE Quality
60-Day Returns

Four Seasons 66459 A/C Suction and Liquid Line Hose Assembly
Overview of Four Seasons Hose Assembly 66459
The Four Seasons Hose Assembly 66459 is designed specifically for the Acura MDX HVAC system, providing reliable A/C suction and liquid line hose assembly performance. Engineered with durable aluminum and rubber materials, this hose assembly supports both high and low system pressures and is compatible with R134a refrigerant.
- Constructed from aluminum and rubber for durability and flexibility
- Includes P-nut fitting on one end and block fitting on the other
- Compatible with R134a refrigerant for Acura MDX A/C systems
- Equipped with captured o-ring style male liquid line
- Includes gasket, fittings, and manifold for complete installation
- Features two R134a quick disconnect service ports with caps
- O-rings and washers included for secure sealing
- Designed without bracket and muffler for streamlined fit
Detailed Product Description
The Four Seasons Hose Assembly 66459 is a precision-engineered A/C suction and liquid line hose assembly tailored for the Acura MDX. This hose assembly is constructed from a combination of aluminum and rubber, ensuring both strength and flexibility under varying temperature and pressure conditions. It supports both high and low system pressures, making it suitable for the entire HVAC refrigerant circuit. The assembly includes a P-nut fitting on one end and a block fitting on the other, facilitating secure connections within the vehicle’s A/C system.
This product comes with a captured o-ring style male liquid line, complete with green round o-rings and washers to ensure leak-free operation. The inclusion of a manifold and fittings simplifies installation, while the two R134a quick disconnect service ports with caps allow for easy maintenance and refrigerant servicing. The hose assembly is designed without a bracket or muffler, providing a direct fit for the Acura MDX HVAC system.
About the Four Seasons Hose Assembly Product Line
The Four Seasons Hose Assembly product line focuses on delivering reliable and OEM-quality hose assemblies for automotive HVAC systems. This line includes components engineered to meet or exceed original equipment specifications, ensuring compatibility and performance. The 66459 hose assembly is part of this line, offering a complete solution for A/C suction and liquid line needs in the Acura MDX.
Common Applications and Issues Addressed
- Replacement of worn or leaking A/C suction and liquid line hoses
- Resolving refrigerant leaks due to damaged fittings or seals
- Restoring proper refrigerant flow and system pressure balance
- Fixing issues related to faulty or missing service ports
- Upgrading OEM components with durable aluminum/rubber assemblies
Installation Notes and Tips
- Ensure system is fully evacuated and depressurized before removal
- Verify compatibility with Acura MDX HVAC system prior to installation
- Use included gaskets, O-rings, and washers to prevent leaks
- Check that service port caps are securely installed after servicing
- Inspect fittings for proper torque to avoid damage or leaks
Quality Assurance and Warranty
The Four Seasons Hose Assembly 66459 is an OEM replacement part designed to meet original equipment standards for fit, form, and function. It includes all necessary seals and fittings to ensure a secure and leak-free installation. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty against defects in materials and workmanship, supporting long-term reliability for Acura MDX owners.
| Brand | Four Seasons |
| Part Number | 66459 |
| Position | Hose Assembly |
| Bracket? | w/o Bracket |
| Description | Hose Assemblies |
| End 1 Type | P-Nut Fitting |
| End 2 Type | Block |
| Fittings Included | Included |
| Friction Material Attachment | w/ Switch Port |
| Gasket Or Seal Included | Included |
| Liquid Line Gender | Male |
| Liquid Line Style | Captured O-Ring |
| Manifold? | w/ Manifold |
| Material | Aluminum / Rubber |
| Muffler? | w/o Muffler |
| O-Ring A Number/Desc | [23678] / Green Round O-Ring |
| O-Ring B Number/Desc | [23678] / Green Round O-Ring |
| O-Ring C Number/Desc | [24824] / washer |
| O-Ring D Number/Desc | [24825] / washer |
| O-Ring E Number/Desc | [24611] / Green O-Ring |
| O.E. Replacement? | Yes |
| Orifice Tube? | w/o Orifice Tube |
| Refrigerant Type | R134a |
| Service Port Cap High Side | 69501 |
| Service Port Cap Low Side | 69500 |
| Service Port Qty | 2 |
| Service Port Type | R134-A Quick Disconnect |
| Service Port Valve Core High Side | 59347 |
| Service Port Valve Core Low Side | 59347 |
| Service Port? | w/ Service Port |
| Style | Hose Assy /Suction, Liquid |
| Suction End Size | No. 12 |
| Suction End Type | Female O-Ring |
| Svc Port High Side | High Side |
| Sve Port Low Side | Low Side |
| System Pressure | High Pressure / Low Pressure |
| Type | Suction & Liquid Line |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2016 | Acura | MDX | N/A | Hose Assembly |
| 2015 | Acura | MDX | N/A | Hose Assembly |
| 2014 | Acura | MDX | N/A | Hose Assembly |
* 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.