Dayco 72805 Radiator Coolant Hose - Lower

Brand	Dayco 72805
Position	Lower
Material	Epdm
Color	Black
End 1 Inside Diameter	1 7/16
End 2 Inside Diameter	1 7/16
Contains Heat Shield	N
Contains Protective Sleeve	Y
End 1 Outside Diameter	2
End 2 Outside Diameter	2
Hose Type	Single i.d. hose
SAE Specification	Sae j20r4 class d-1, sae j1684 type ec
Trunk Height	15 1/2
Product line	Curved Radiator Hose
Fits	BMW · 4 vehicles

EPDM construction. Resists heat and coolant exposure for dependable hose performance.

Protective sleeve included. Adds extra abrasion resistance where the hose needs it most.

Single I.D. hose. Provides a consistent internal diameter for steady coolant flow.

$46.02Free shipping

In stock · usually ships same day before 1pm CST

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Dayco 72805 Lower Radiator Hose for BMW Z4

Dayco 72805 is a curved radiator coolant hose for the lower cooling circuit on select BMW Z4 applications. Built from EPDM with a black finish and a protective sleeve, it is specified for 2003-2004 BMW Z4 lower hose fitment and supports reliable coolant transfer in a curved routing layout.

Key Features

EPDM construction for coolant-system service
Curved radiator hose profile for lower routing
1 7/16 in. inside diameter at both ends
2 in. outside diameter at both ends
Black finish with protective sleeve
Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

This Dayco Curved Radiator Hose line is built for applications that require a formed hose shape and consistent coolant flow through the lower radiator path. Part number 72805 uses EPDM material for durability in cooling-system environments and includes a protective sleeve for added abrasion resistance where the hose routes near surrounding components. For BMW Z4 owners searching for a lower radiator hose, Dayco 72805 matches the listed 2003 and 2004 fitments and the curved hose configuration noted for these vehicles.

Compatible With: 2003 BMW Z4, lower; 2004 BMW Z4, lower. This part cross-references no listed alternate part numbers for the same application.

What It Helps Address

Coolant leakage from a worn lower radiator hose
Cracking or hardening in an aging EPDM hose
Improper hose routing in a curved lower hose application
Heat and abrasion wear along the hose path
Restricted coolant transfer caused by hose deterioration

Installation Notes and Tips

Verify the lower hose routing and end diameters before installation on the BMW Z4. Inspect adjoining clamps, radiator necks, and engine-side connections for wear or corrosion, and confirm the hose sits correctly in the curved path without twisting. Match the vehicle year and lower-position application exactly to the listed fitment for Dayco 72805.

Quality Assurance

Dayco specifies this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, supporting consistent material and performance requirements for radiator coolant service.

This part fits 4 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2004	BMW	Z4	2.5L	L6	Lower	Early; Curved Radiator Hose
2004	BMW	Z4	3.0L	L6	Lower	Early; Curved Radiator Hose
2003	BMW	Z4	2.5L	L6	Lower	Curved Radiator Hose
2003	BMW	Z4	3.0L	L6	Lower	Curved Radiator Hose
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