Dayco 73101 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 73101

Dayco 73101 is a curved radiator coolant hose built from EPDM and finished in black for cooling-system service. It is a branched hose with 1 7/16-inch inside diameter ends and a 7/8-inch third branch, made for lower radiator routing on select BMW applications.

Compatible With 2008-2014 BMW X6, lower and 2011-2013 BMW X5, lower, this Dayco Curved Radiator Hose supports the coolant path in vehicles that use a branched lower hose layout. The Dayco curved radiator hose line is focused on application-specific hose shapes and dimensions for direct replacement service.

Key Features

• EPDM construction for coolant-system use
• Black hose finish
• Branched hose design with curved routing
• 1 7/16-inch inside diameter at End 1 and End 2
• 7/8-inch inside diameter at End 3
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Lower-position hose for select BMW X5 and BMW X6 applications

Detailed Description

Dayco 73101 is a radiator coolant hose engineered for lower cooling-system routing where a branched configuration is required. The EPDM rubber construction is suited to coolant exposure and temperature cycling, while the curved shape helps match the factory hose path on the BMW X5 and BMW X6 applications listed below. This part number, 73101, is specified for 2008-2014 BMW X6 lower hose service and 2011-2013 BMW X5 lower hose service.

Use this hose when replacing a worn, cracked, swollen, or leaking lower radiator hose on a BMW X5 or BMW X6 with the matching branched layout. The Dayco 73101 dimensions and SAE specifications support accurate fitment in cooling-system repair work.

What It Is Used For

• Replacing a leaking lower radiator coolant hose
• Restoring coolant flow in a branched hose layout
• Addressing hose cracking, hardening, or swelling
• Repairing lower hose routing on BMW X5 and BMW X6 models
• Correcting coolant seepage at hose connection points

Installation Notes and Tips

Verify the vehicle year, model, and lower-hose routing before installation. Inspect adjoining clamps, necks, and coolant fittings for wear or corrosion, and confirm the hose ends match the 1 7/16-inch and 7/8-inch dimensions before assembly. Drain and refill coolant according to the vehicle service procedure, then check for leaks after the engine reaches operating temperature.

Quality Assurance

Dayco manufactures cooling-system hoses to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for specified applications. Part number 73101 is built for the listed BMW fitments and cooling-system service conditions.