Rein CHR0379R Radiator Coolant Hose - Upper

OE Quality Upper Radiator Hose for BMW Z4

Rein CHR0379R is an OE quality radiator coolant hose built for the upper cooling circuit on 2003-2005 BMW Z4 models. It follows the original hose shape and connection style for a direct-fit replacement on European vehicles, including the thermoplastic quick connect fittings used by the OE design.

• Direct replacement for the upper radiator coolant hose
• Fits 2003-2005 BMW Z4, upper
• Reduces installation time with application-specific fitment
• No cutting, refitting, or hose adjustment required
• Helps prevent leaks from reusing old quick connectors and o-rings
• EPDM hose construction resists heat, salt, road debris, oil, and other contaminants
• Built to SAE J20 R4 D2 industry standards
• Black hose with a 15-inch centerline length

Detailed Product Overview

Rein CHR0379R is engineered as a direct OE-style radiator hose for the BMW Z4 cooling system. The hose matches the original size and shape requirements, including the branch and connector geometry called for by the factory design. With a 1.810-inch inside diameter at both ends and a maximum working pressure of 50 psi, this upper radiator hose supports a precise replacement for the original part.

This part cross-references Genuine 17127514404 for the same application. For buyers searching for a BMW Z4 upper radiator hose, BMW Z4 coolant hose replacement, or Rein CHR0379R radiator hose, this part provides the OE-style fit expected for the 2003-2005 BMW Z4.

Common Problems This Hose Can Address

• Coolant seepage at worn hose connections
• Cracked or hardened original radiator hose material
• Leaks caused by aged quick-connect fittings or o-rings
• Cooling system service delays from hose modification requirements
• Fitment issues from non-OE-shaped replacement hoses

Installation Notes and Tips

Verify the upper hose routing and connector style against the original BMW Z4 hose before installation. Because this is an application-specific direct-fit hose, no cutting or refitting should be necessary when used on the listed vehicles. Inspect mating surfaces, quick connectors, and sealing rings during service to help ensure a proper seal.

Quality Assurance

Rein designs this radiator hose as an OE quality replacement for European vehicles, with construction and connector details matched to the original manufacturer’s specifications. CHR0379R is backed by a 24-month or 24,000-mile warranty.