Gates 12109 HVAC Heater Hose - Heater To Pipe

Gates Molded Heater Hose 12109 Overview

Gates 12109 is a factory-molded heater hose built for tight engine bays where a straight hose will not route correctly. It uses an OEM-style molded shape and a 3/4 in. inside diameter at both ends for direct coolant routing on supported applications, including the 2012-2018 Chevrolet Sonic heater to pipe location.

Key Features

• Factory-molded design for accurate routing in compact engine compartments
• 3/4 in. inside diameter at both ends for consistent hose connection sizing
• EPDM and plastic construction for coolant, water, and air service
• Approved for marine applications
• Centerline length: 17.15 in. (436 mm)
• Compatible with 2012-2018 Chevrolet Sonic, heater to pipe

Product Details

This Gates Molded Heater Hose is part of the Gates Molded Heater Hose line, which focuses on OEM-style formed hoses for modern vehicles with tighter packaging around the engine. Part number 12109 is shaped to follow the original routing path, helping maintain proper hose alignment in the cooling system. It also cross-references Bosch 13109 for the same application.

For Chevrolet Sonic models from 2012 through 2018, this hose supports the heater to pipe connection with the correct molded profile and 3/4 in. end sizing. Gates 12109 is a practical replacement when the original hose has hardened, cracked, or no longer holds its formed shape.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged heater hose
• Improper routing caused by a collapsed or misshaped hose
• Restricted coolant flow through a deteriorated hose passage
• Heat-related hose damage in tight engine compartments
• Service issues on the heater to pipe connection in a Chevrolet Sonic

Installation Notes and Tips

Verify end diameter, molded shape, and centerline length before installation. Confirm the hose routing matches the original heater to pipe path on the 2012-2018 Chevrolet Sonic, and inspect adjoining pipe ends and clamps for wear or corrosion before reassembly. Drain coolant as needed and refill the system according to the vehicle service procedure after installation.

Quality Assurance

Gates manufactures this molded heater hose to OE-style dimensions and materials for consistent fit and routing. The hose is suitable for coolant, water, air, and approved marine applications.