Gates 19335 HVAC Heater Hose - Heater (Upper)

Gates Molded Heater Hose 19335 Overview

The Gates 19335 molded heater hose is an OEM-style coolant hose built for tighter engine bays where a formed routing path matters. It is made from EPDM and is shaped to match the factory-style layout used on 2003-2008 Mazda 6 heater upper applications.

Gates Molded Heater Hose line focuses on factory-molded hose shapes for modern vehicles with compact engine compartments. This hose is also approved for coolant, water, air, and marine applications, giving it broad service use where the specified dimensions and routing match the vehicle.

Key Features

• Part number 19335
• Factory-molded, OE-style hose shape
• EPDM construction for coolant system service
• End inside diameters: 17 mm (.65 in) and 19 mm (.73 in)
• Centerline length: 691 mm (27.2 in)
• Compatible with coolant, water, air, and marine applications
• Fits 2003-2008 Mazda 6, Heater (Upper)

Detailed Description

Gates 19335 is a molded heater hose engineered for the upper heater circuit on the 2003-2008 Mazda 6. The formed profile helps the hose follow the original routing in confined engine compartments, reducing the need to force a straight hose into a curved path. If you are replacing a worn or leaking Mazda 6 heater hose, this part number 19335 provides the correct molded configuration for the listed application.

This hose uses EPDM material and measures 691 mm centerline length with 17 mm and 19 mm end inside diameters. Those dimensions are important for maintaining proper fit at the connection points and for preserving the intended hose path in the cooling system. This part cross-references Quality-Built 11335 for the same application.

Common Problems This Hose Can Address

• Coolant seepage from a cracked or aged heater hose
• Improper routing caused by a non-molded replacement hose
• Softening or deterioration from heat and coolant exposure
• Restricted fitment in tight engine compartments
• Loss of heater circuit integrity on a 2003-2008 Mazda 6

Installation Notes and Tips

Verify the hose routing, end diameters, and centerline length against the original part before installation. Confirm that the vehicle is a 2003-2008 Mazda 6 with the Heater (Upper) hose position listed in the fitment data. Inspect adjoining clamps, pipes, and connection surfaces for wear or corrosion before installing the new hose.

Quality Assurance

Gates is known for OE-style hose engineering and molded replacement parts that follow factory routing requirements. Part number 19335 is built to match the listed application dimensions and molded configuration for direct service use on the specified Mazda 6 fitment.