Dayco 72832 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose for BMW Lower Cooling Service

Dayco 72832 is a branched lower radiator coolant hose built from EPDM and finished in black for a direct-fit cooling system repair. It is shaped for the lower hose routing used on select BMW 7 Series and 5/6 Series applications, including BMW 750i, 750Li, 545i, 645Ci, 745i, and 745Li.

The Dayco Curved Radiator Hose line focuses on formed hose geometry for vehicle-specific coolant routing. Part number 72832 follows that approach with a branched design and SAE J20R4 Class D-1 / SAE J1684 Type EC compliance for the listed applications.

Key Features

• Brand: Dayco
• Part number: 72832
• Curved radiator coolant hose for lower hose routing
• EPDM construction with black finish
• Branched hose design for multi-branch coolant routing
• End 1 inside diameter: 1 7/16 in.
• End 2 inside diameter: 1 7/16 in.
• End 3 inside diameter: 21/32 in.
• SAE J20R4 Class D-1 and SAE J1684 Type EC
• No heat shield and no protective sleeve

Product Details

Dayco 72832 is a formed lower radiator hose engineered for the cooling system layouts used on select BMW models. The EPDM rubber construction is suited to coolant service, while the branched hose profile supports the factory-style routing found on these vehicles. If you are replacing a worn BMW lower radiator hose, this part number 72832 provides a vehicle-specific solution for the listed fitments.

Compatible With 2006-2008 BMW 750i, lower; 2006-2008 BMW 750Li, lower; 2004-2005 BMW 545i, lower; 2004-2005 BMW 645Ci, lower; 2002-2005 BMW 745i, lower; and 2002-2005 BMW 745Li, lower. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the hose under heat and pressure
• Improper coolant routing caused by a damaged branched hose
• Loss of cooling-system integrity on BMW 750i, 750Li, 545i, 645Ci, 745i, and 745Li applications
• Service replacement for a worn Dayco 72832 lower radiator hose

Installation Notes and Tips

Verify hose routing, end diameters, and lower-position fitment before installation. Inspect adjoining clamps, necks, and coolant pipes for wear or corrosion, and flush the cooling system if contamination is present. After installation, refill with the correct coolant specification for the vehicle and check for leaks at operating temperature.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for the listed applications. The EPDM construction and formed hose design support consistent fitment on the specified BMW models.