Dayco 73142 Radiator Coolant Hose - Upper

Brand	Dayco 73142
Position	Upper
Material	Epdm
Color	Black
End 1 Inside Diameter	1 1/4
End 2 Inside Diameter	1 5/16
Contains Heat Shield	N
Contains Protective Sleeve	N
End 1 Outside Diameter	1 5/8
End 2 Outside Diameter	1 11/16
Hose Type	Dual i.d. hose
SAE Specification	Sae j20r4 class d-1, sae j1684 type ec
Trunk Height	16 1/2
Product line	Curved Radiator Hose
Fits	Mazda · 3 vehicles

Curved radiator hose. Engineered for a smooth, routed coolant connection.

EPDM construction. Resists heat and coolant exposure for dependable service.

Dual I.D. hose. Sized with different end diameters for a precise fit.

$43.02Free shipping

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Dayco 73142 Curved Radiator Hose for Mazda 6

Dayco 73142 is a curved radiator coolant hose built for upper cooling-system routing on select Mazda 6 models. It uses EPDM construction and a dual I.D. hose design to match the application-specific diameter changes found in this fitment.

Key Features

EPDM rubber construction for coolant hose service
Black finish
Dual I.D. hose design with 1 1/4 in. end 1 inside diameter and 1 5/16 in. end 2 inside diameter
End 1 outside diameter: 1 5/8 in.; end 2 outside diameter: 1 11/16 in.
Upper curved radiator hose profile for the cooling circuit
Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

The Dayco Curved Radiator Hose line is engineered for formed coolant routing where a straight hose will not match the vehicle layout. This Dayco 73142 hose is shaped for the upper radiator connection on 2011-2013 Mazda 6 models and is sized to transition between the two specified inside diameters. For buyers searching for a 2011-2013 Mazda 6 upper radiator hose or a Dayco 73142 curved radiator hose, this part matches the listed application and dimensional requirements.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Cooling System Issues

Cracked or hardened upper radiator hose material
Coolant seepage at the hose connection points
Improper hose fit due to incorrect diameter or formed shape
Heat-related hose deterioration in the engine bay
Restricted coolant routing from a damaged curved hose

Installation Notes and Tips

Verify the hose routing, end diameters, and upper position before installation. Confirm the mating necks are clean and free of debris, then inspect clamps and adjacent cooling components for wear before reassembly. This hose is listed for 2011-2013 Mazda 6 upper applications only.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and dimensional standards for cooling-system service.

This part fits 3 vehicles

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

Year	Make	Model	Liters	Cylinders	Position	Notes
2013	Mazda	6	2.5L	L4	Upper	Curved Radiator Hose
2012	Mazda	6	2.5L	L4	Upper	Curved Radiator Hose
2011	Mazda	6	2.5L	L4	Upper	Curved Radiator Hose
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