HomeHVAC > Hoses and PipesFour Seasons 66851 A/C Refrigerant Suction Hose
Part #: 66851

Four Seasons 66851 A/C Refrigerant Suction Hose

Hose Assembly
3 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Hose Assembly
Fitment: Mazda, 3
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Hose Assembly 66851

The Four Seasons Hose Assembly 66851 is designed specifically for the Mazda 3, providing a reliable A/C refrigerant suction hose solution. Engineered with durable aluminum and rubber materials, this hose assembly ensures efficient low-pressure refrigerant flow for R134-a systems.

  • Constructed from aluminum and rubber for durability and flexibility
  • Includes springlock fitting on one end and P-nut fitting on the suction end
  • Compatible with R134-a refrigerant systems at low pressure
  • Comes with all necessary fittings, gaskets, and O-rings for installation
  • Equipped with a 13 mm service port on the low-pressure side
  • OE replacement part designed to meet original equipment specifications

Detailed Product Description

This Four Seasons Hose Assembly 66851 belongs to the Hose Assembly product line, which focuses on delivering complete hose solutions for automotive HVAC systems. The assembly combines aluminum tubing with rubber sections to balance strength and flexibility, reducing the risk of leaks or damage under typical operating conditions. It features a springlock fitting on one end and a P-nut fitting on the suction end, ensuring secure connections within the A/C system. The included green O-rings and spring seal provide a tight, leak-free seal, while the integrated service port allows for easy refrigerant charging and system maintenance.

Compatible Vehicles and Applications

This A/C refrigerant suction hose assembly is compatible with Mazda 3 models requiring R134-a refrigerant. It is designed to replace the original equipment part, maintaining system integrity and performance.

  • Replaces worn or damaged suction lines in Mazda 3 A/C systems
  • Addresses low-pressure refrigerant leaks or hose deterioration
  • Restores proper refrigerant flow for efficient cooling
  • Eliminates issues related to faulty or missing service ports
  • Prevents contamination and moisture ingress through secure seals

Installation Notes and Tips

Installation of the Four Seasons Hose Assembly 66851 should be performed by a qualified technician familiar with automotive HVAC systems. Ensure all old hoses and seals are fully removed before fitting the new assembly. Use the included gaskets and O-rings to prevent leaks, and verify that the springlock and P-nut fittings are securely connected. The service port allows for convenient system evacuation and recharge. Avoid using hoses with brackets or mufflers as this assembly does not include these components.

Quality Assurance and Warranty

Four Seasons manufactures this hose assembly to meet or exceed original equipment standards, ensuring reliable performance and durability. The part number 66851 is an OE replacement designed for Mazda 3 vehicles. The product includes all necessary fittings and seals to facilitate proper installation and long-term operation. Warranty details should be confirmed with the product documentation or manufacturer.

BrandFour Seasons
Part Number66851
PositionHose Assembly
Bracket?w/o Bracket
Component TypeSuction Line
DescriptionHose Assemblies
End 1 TypeSpringlock
Fittings IncludedIncluded
Friction Material Attachmentw/o Switch Port
Gasket Or Seal IncludedIncluded
MaterialAluminum / Rubber
Muffler?w/o Muffler
O-Ring A Number/Desc[24670] / Green O-Ring
O-Ring B Number/Desc[24220] / Spring
O-Ring C Number/Desc[24610] / Green O-Ring
O.E. Replacement?Yes
Refrigerant TypeR134-A
Service Port Qty1
Service Port Size13 mm
Service Port?w/ Service Port
Suction End TypeP-Nut Fitting
Sve Port Low SideLow Side
Switch Included?Not Included
System PressureLow Pressure

This part fits 3 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2009Mazda3Mazdaspeed2.3LL4N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2008Mazda3Mazdaspeed2.3LL4N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2007Mazda3Mazdaspeed2.3LL4N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; 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:

21176257272166851785837801244A83531BA6R61462HA111539C

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.