Dayco 73102 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for BMW

Dayco 73102 is a curved radiator coolant hose built for upper cooling-system routing on select BMW X5 and BMW X6 applications. It uses EPDM construction with a black finish and a protective sleeve to support heat and abrasion resistance in demanding engine-bay conditions.

Key Features

• EPDM rubber construction for coolant-system service
• Curved branched hose design for upper radiator routing
• Protective sleeve included for added surface protection
• Black finish for OE-style appearance
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 73102 for easy identification

Product Details

Dayco’s Curved Radiator Hose line is engineered for cooling-system replacement where formed routing and consistent hose shape matter. Part number 73102 features 1 7/16-inch inside diameter ends at the main connections, a 13/16-inch branch end, and an 11-inch trunk height. The branched hose layout supports the upper radiator hose path used on BMW X5 and BMW X6 models, helping maintain proper coolant flow through the engine cooling circuit. This part cross-references no listed alternate part numbers in the provided data.

What It Helps Address

• Cracked or aged upper radiator hose material
• Coolant leaks at formed hose connections
• Collapsed or softened hose sections from heat exposure
• Improper hose routing in the upper cooling circuit
• Surface wear where the hose contacts nearby components

Installation Notes and Tips

• Verify hose routing against the original upper radiator hose before installation.
• Inspect clamps, necks, and mating surfaces for corrosion or damage before reassembly.
• Confirm the 1 7/16-inch and 13/16-inch connection sizes match the vehicle application.
• Check coolant level and bleed the cooling system after installation.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC standards for cooling-system service. Compatible with 2008-2019 BMW X6, upper, and 2011-2018 BMW X5, upper. Dayco 73102 is a direct-fit cooling hose choice for BMW X5 and BMW X6 upper radiator hose replacement needs.