Rein CHE0545 Engine Coolant Hose - Transmission Oil Cooler To Radiator

OE Coolant Hose for BMW Cooling Service

Rein CHE0545 is an OE-quality engine coolant hose built for European vehicle cooling systems. It is made as a direct replacement for the original hose assembly, with the correct branch shape and thermoplastic quick-connect fittings for a cleaner repair on BMW applications.

Compatible with select BMW 528i, 550i, 550i xDrive, 550i GT, 550i GT xDrive, 650i, 650i xDrive, 650i Gran Coupe, and 650i xDrive Gran Coupe models, CHE0545 is designed for the transmission oil cooler to radiator connection.

Key Features

• Direct OE-style replacement for the original coolant hose assembly
• Thermoplastic quick-connect fittings for factory-style connection points
• EPDM hose construction with black finish
• Resistant to heat, salt, road debris, oil, and other contaminants
• SAE J20R4D1 construction standard
• Reduces installation time by eliminating hose cutting, refitting, or adjustment
• Helps prevent leaks and repeat repairs from reused quick connectors and O-rings

Detailed Description

Rein CHE0545 is engineered as a replacement water hose for BMW cooling-system service where the transmission oil cooler connects to the radiator. The hose follows OE dimensions and routing details, including the branch shape and connector style, so it matches the original layout more closely than a universal hose. For BMW 550i and BMW 650i applications, that OE-style fit helps support a straightforward repair and consistent connection at the cooling circuit.

This Rein coolant hose uses EPDM material for durability in demanding underhood conditions. The quick-connect design supports a factory-style installation and avoids the need to reuse worn connectors or aged seals. Part number CHE0545 is also a direct reference for BMW 17127592651.

What It Helps Fix

• Coolant leaks at the hose or connector interface
• Cracked, hardened, or heat-aged original hose material
• Damaged quick-connect fittings or worn O-rings
• Improper fit from modified or universal hose replacements
• Repeat cooling-system repairs caused by reused connectors

Installation Notes and Tips

Verify the vehicle’s cooling-hose routing and connector style before installation. This hose is application-specific and should be installed in the transmission oil cooler to radiator position listed for the vehicle. Inspect mating surfaces, seals, and adjacent cooling components for wear or contamination before assembly. CHE0545 is built to reduce installation time, but proper cleaning and inspection remain important for a reliable seal.

Quality Assurance

Rein Automotive OE-quality hoses are built for European vehicles and follow original-style dimensions and connector design. CHE0545 is manufactured to meet SAE J20R4D1 requirements and is made as a direct replacement for the OE hose assembly.