Rein CHR0037P Radiator Coolant Hose - Lower - Radiator To Water Pump

OE Quality Lower Radiator Hose

Rein CHR0037P is an OE-quality radiator coolant hose for European vehicle cooling systems. It is built as a direct replacement for the original hose assembly, with the correct branch shape and thermoplastic quick connect fittings for a factory-style fit on BMW applications.

Compatible With 2002-2004 BMW 745i and 745Li lower radiator to water pump routing, this Rein radiator hose is designed for accurate fitment and reliable sealing in the cooling circuit.

Key Features

• Direct-fit replacement for OE radiator hose assemblies
• Reduces installation time by matching original hose geometry
• No cutting, refitting, or adjusting the hose during installation
• Helps prevent leaks and repeat repairs from reused quick connectors and O-rings
• EPDM hose construction resists heat, salt, road debris, oil, and other contaminants
• Thermoplastic quick connect fittings for OE-style connection points
• SAE J20 R4 D1 industry standard construction
• Protective shield included for added durability

Detailed Description

Rein CHR0037P is a black single radiator coolant hose with a centerline length of 9.75 inches and 0.87-inch inside diameter ends. It is engineered for the lower radiator to water pump position on BMW 745i and BMW 745Li models, including 2002-2003 vehicles and 2004 vehicles built to 9/03 with quick connectors. The hose follows OE dimensions and connector design, making it a practical choice for BMW 745i radiator hose replacement and BMW 745Li lower coolant hose service.

This part cross-references BMW 17127508014 for the same application.

Common Problems This Hose Can Address

• Coolant leaks at worn hose connections
• Cracked or heat-aged radiator hose material
• Improper sealing from reused quick connectors or O-rings
• Fitment issues caused by non-OE hose shape
• Extended repair time from trimming or modifying the hose

Installation Notes and Tips

Use this hose on the lower radiator to water pump route specified for the listed BMW applications. Verify connector style and vehicle build date before installation, especially on 2004 BMW 745i and 745Li models built to 9/03. Inspect mating surfaces, replace damaged seals as needed, and confirm the quick connect fittings are fully seated before refilling the cooling system.

Quality Assurance

Rein designs this hose as an OE-quality replacement for European vehicles, with dimensions and connector details matched to the original assembly. Part number CHR0037P is backed by a 24-month or 24,000-mile warranty.