Rein CHR0009P Radiator Coolant Hose - Lower or Lower - Radiator To Thermostat

OE-Style Radiator Hose for BMW Cooling Systems

Rein CHR0009P is an OE quality radiator coolant hose built for European vehicle cooling systems that require a direct-fit replacement. It is shaped to match the original hose layout for BMW applications, helping reduce installation time while maintaining the correct routing and connection points.

Designed for BMW 545i, 645Ci, 745i, 745Li, 750i, and 750Li applications, this radiator hose uses EPDM construction and thermoplastic quick connect fittings for a factory-style fit. The CHR0009P is a direct replacement for the lower radiator-to-thermostat hose on listed vehicles.

Key Features

• Direct-fit replacement for OE radiator hose assemblies
• Reduces installation time with application-specific design
• No cutting, refitting, or hose adjustment required
• Thermoplastic quick connect fittings help prevent leaks and repeat repairs
• EPDM hose material resists heat, salt, road debris, oil, and contaminants
• Built to SAE J20 R4 D1 industry standards
• Black finish with OE-style routing and dimensions

Detailed Description

Rein CHR0009P is engineered as a complete OE quality direct fit European hose for BMW cooling system service. It matches the original hose shape and branch layout, including the thermoplastic quick connect fittings, so the replacement follows the factory configuration instead of requiring modification. The hose measures 18.31 inches centerline length and is rated for 50 psi maximum working pressure.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. For BMW 750i and BMW 750Li lower radiator to thermostat service, as well as BMW 545i, 645Ci, 745i, and 745Li lower hose replacement, CHR0009P provides the correct OE-style routing and connection design.

What It Helps Fix

• Coolant leaks from a cracked or aged radiator hose
• Repeat leaks caused by worn quick connectors or o-rings
• Improper hose fit after previous repair attempts
• Cooling system service delays from hose modification
• Heat-related hose deterioration in BMW cooling circuits

Installation Notes and Tips

Fits 2006-2008 BMW 750i, lower - radiator to thermostat. Fits 2006-2008 BMW 750Li, lower - radiator to thermostat. Fits 2004-2005 BMW 545i, lower. Fits 2004-2005 BMW 645Ci, lower. Fits 2002-2005 BMW 745i, lower - radiator to thermostat. Fits 2002-2005 BMW 745Li, lower - radiator to thermostat.

Use the existing vehicle routing and verify connector engagement before refilling the cooling system. Because this hose is application-specific, confirm the position and connection style against the original part before installation. The quick connect design is intended to simplify replacement on the listed BMW models.

Quality Assurance

Rein designs this radiator hose as an OE-quality replacement for European vehicles, with dimensions and connector style matched to the original manufacturer specification. Part number CHR0009P is backed by a 24-month or 24,000-mile warranty.