URO GRH642 Radiator Coolant Hose - Lower
OE Quality 60-Day Returns
URO

URO GRH642 Radiator Coolant Hose - Lower

Brand URO GRH642
Position Lower
Material Epdm
End 1 Inside Diameter 1.20
End 2 Inside Diameter 1.20
Centerline Length 21
Branch Quantity 1
End 3 Inside Diameter (In) 0.61
Molded Yes
Number Of Quick Connect Fittings 0
Fits —

Guaranteed fitment. Precision-molded to OE dimensions and shape for easy installation.

EPDM construction. Resists engine heat, ozone, and electrochemical degradation.

Molded hose design. Built to match the original shape for a clean, direct replacement.

Cross-references URO GRH642, BHH2124 and URO-005988 for the same application. See all 3.

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Not what you need? See all Radiator Coolant Hose options

Radiator Coolant Hose for OE-Style Cooling Repair

The URO GRH642 radiator coolant hose is a molded replacement hose built to OE dimensions and shape for straightforward installation. It is made from EPDM and engineered for heat, ozone, and electrochemical degradation resistance in demanding cooling-system service.

Compatible With BMW 3 Series and BMW 5 Series cooling system applications where this hose configuration is specified, the GRH642 supports reliable coolant transfer and a proper factory-style fit. This part number, GRH642, is also referenced for cross-application lookup as URO-005988 and BHH2124.

Key Features

  • EPDM construction for durability in engine bay temperatures
  • Molded hose profile with OE dimensions and shape
  • 1.20 in. inside diameter at both main ends
  • 0.61 in. branch inside diameter
  • 21 in. centerline length
  • Temperature rating from -40°F to 275°F
  • 24-month unlimited mileage warranty

Detailed Product Description

The URO GRH642 is a radiator coolant hose designed for vehicles that require a molded, OE-style replacement in the cooling circuit. Its EPDM rubber construction resists engine heat and ozone exposure, while the ECD-resistant formulation helps reduce internal rubber breakdown caused by electrolysis. For BMW 3 Series and BMW 5 Series service work, GRH642 provides a direct-fit hose profile that matches the original routing and shape.

Common Cooling System Issues It Can Address

  • Coolant leaks from a cracked or aged hose
  • Softening, swelling, or collapse of the original hose
  • Improper hose routing after prior repair work
  • Cooling-system pressure loss from deteriorated rubber
  • Heat-related hose failure in high-temperature operation

Installation Notes and Tips

Inspect the mating pipes, clamps, and nearby cooling components before installation. Confirm the hose routing matches the original layout and verify the connection diameters of 1.20 in. and 0.61 in. before assembly. After installation, refill and bleed the cooling system according to the vehicle service procedure and check for leaks at operating temperature.

Quality Assurance

GRH642 is backed by a 24-month unlimited mileage warranty. It is precision-molded to OE dimensions and shape for fitment consistency and built from EPDM material rated for temperatures from -40°F to 275°F.

Related reading

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
URO — GRH642BHH2124URO-005988