Gates 12329 HVAC Heater Hose - Connector To Pipe

Gates Molded Heater Hose for Tight Engine Bays

The Gates Molded Heater Hose, part number 12329, is a factory-molded coolant hose built for compact engine compartments where a straight hose will not follow the original routing. It is made from EPDM and is suitable for coolant, water, and air service, with marine application approval.

Compatible With 2015-2017 Lexus NX200t and 2019 Lexus NX300, this molded heater hose supports OE-style replacement needs for the connector-to-pipe location. Gates 12329 is shaped to match the original path and help maintain proper hose routing in confined HVAC and cooling system layouts.

Key Features

• Factory-molded, OE-style hose profile
• EPDM construction for coolant system service
• End 1 inside diameter: 0.62 in. (16 mm)
• End 2 inside diameter: 0.72 in. (18 mm)
• Centerline length: 15.89 in. (404 mm)
• Approved for coolant, water, air, and marine applications
• Gates molded heater hose line for tight-fit engine routing

Product Details

Gates 12329 is part of the Molded Heater Hose product line, which focuses on shaped replacement hoses for modern vehicles with smaller, tighter engine compartments. The molded design helps preserve the original hose path, making it a practical choice when replacing a heater hose that must connect from a connector to a pipe without forcing the line into an unnatural bend. This part cross-references Bosch 13329 for the same application.

Common Problems This Hose Can Address

• Cracked or aged heater hose material
• Improper hose routing in confined engine bays
• Coolant leaks at a connector-to-pipe connection
• Restricted flow caused by a collapsed or misshaped hose
• Replacement needs for molded HVAC heater hose routing

Installation Notes and Tips

Verify the end diameters and centerline length against the original hose before installation. Confirm the routing matches the connector-to-pipe position on the vehicle, and inspect adjoining pipes and clamps for wear, corrosion, or residue before installing the new hose. For best results, follow the factory routing path so the molded shape is not twisted or stressed.

Quality Assurance

Gates manufactures this molded heater hose as an OE-style replacement part for vehicles that require precise hose shaping and reliable material performance in coolant system service.