Gates 52459 Modular Coolant Hose with Branch and 2 Female Quick Connectors

The Gates 52459 is a premium modular (branched) radiator coolant hose engineered to exact OEM specifications for select Audi applications. As part of the Gates Modular Coolant Hose lineup — the aftermarket leader in this specialized segment — this hose is manufactured with the precise integrated OEM-equivalent components built in, including one branch connector, two female quick connectors, and a protective sleeve. This eliminates the need to source separate fittings and ensures a factory-correct installation. The hose measures approximately 27.6 inches (701 mm) in centerline length and features three connection ends with inside diameters of 0.75 in. (19 mm), 1.51 in. (38 mm), and 1.56 in. (40 mm centerline).

Key Features:

• Modular design with one branch, two female quick connectors, and a protective sleeve — all OEM-matched components included
• EPDM inner tube with synthetic fiber knit reinforcement and heat-, ozone-, and chemical coolant-resistant EPDM cover
• Engineered to resist electrochemical degradation — the leading cause of coolant hose failure
• Specifically engineered materials resist collapse under vacuum
• Temperature rated from -40°F to +257°F (-40°C to +125°C)
• Meets SAE 20R3 EC Class D1 (under 1 in. ID) and SAE 20R4 EC Class D1 (1 in. ID and over)
• Molded construction; not intended for fuel or oil transfer applications

Gates coolant hoses are built to deliver reliable, long-lasting cooling system performance that matches OEM fit and function. This hose fits select 2017–2021 Audi models. Gates recommends replacing hose clamps each time a new coolant hose is installed.