Gates 65003 HVAC Heater Hose

Gates 65003 Molded Coolant Hose for Tesla Thermal Management

Gates 65003 is a molded thermoplastic coolant hose built for modern thermal management systems in Tesla vehicles. It uses a plastic construction with a branch layout and two female quick connectors to support coolant routing in battery and HVAC-related applications.

The Gates Molded Coolant Hose line reflects Gates’ long history in OEM and aftermarket thermal management, with product development focused on material science and fluid-flow performance. For Tesla Model 3 and Model Y applications, this hose supports precise coolant routing where molded shape and connector fit are critical.

Key Features

• Brand: Gates Molded Coolant Hose
• Part number: 65003
• Material: plastic thermoplastic coolant hose construction
• Branch design with two female quick connectors
• Centerline length: 20.5 in. (521 mm)
• End inside diameter: 0.675 in. (17 mm) at both ends
• Contains spring: No
• Built for thermal management routing in electric vehicle coolant systems

Detailed Description

Gates 65003 is a molded HVAC heater hose / coolant hose assembly engineered for controlled fluid routing in Tesla thermal systems. Its molded branch configuration helps maintain the intended hose path, while the quick-connect ends support secure connection points in battery and coolant manifold layouts. This part cross-references Monroe Shocks & Struts (e.g., 107757700C, R45003) for the same application.

Compatible With Tesla Model 3 and Tesla Model Y applications, this hose is listed for 2022-2025 Tesla 3 battery tube left front manifold use, 2022-2024 Tesla Y battery tube left front manifold use, 2017-2021 Tesla 3 high voltage battery front right assembly to tee use, and 2020-2021 Tesla Y tee to high voltage battery left front use. If you are replacing a molded coolant hose on a Tesla Model 3 or Model Y, Gates 65003 provides the correct molded routing profile for these specific applications.

What This Hose Helps Address

• Coolant leaks caused by cracked or aged molded hose sections
• Improper routing in battery thermal management lines
• Loose or worn quick-connect interfaces
• Restricted coolant flow from damaged hose geometry
• Service issues in Tesla Model 3 and Model Y coolant manifold connections

Installation Notes and Tips

Verify the hose path, connector style, and end diameters against the removed part before installation. Because this is a molded hose with branch geometry, correct orientation matters for proper fitment in Tesla battery and coolant routing assemblies. Inspect mating connectors and sealing surfaces for wear or contamination before connecting the new hose.

Quality Assurance

Gates has more than 75 years of experience in automotive hose and thermal management solutions. The Molded Coolant Hose line is developed from Gates’ OEM and aftermarket engineering background, with attention to durability, fit, and thermal system performance.