Rein CHE0925 Engine Coolant Hose - Expansion Tank (Upper) To Cylinder Heads

OE-Style Coolant Hose for BMW Cooling Systems

The Rein CHE0925 engine coolant hose is an OE-quality replacement for select BMW cooling system applications. It is built to match the original hose layout, including the branch sizing and thermoplastic quick-connect fittings used on the factory part.

For BMW 230i, 330i, and 430i models, this coolant hose provides a direct replacement for the upper expansion tank to cylinder heads routing. The black hose construction and OE-style dimensions support a clean factory-style repair on European vehicles.

Key Features

• OE-quality engine coolant hose for European vehicle cooling systems
• Direct replacement for the original hose assembly
• Black coolant hose finish
• Hose end 1 outside diameter: 23.88 mm
• Hose end 2 outside diameter: 23.88 mm
• Hose end 1 inside diameter: 10.67 mm
• Hose end 2 inside diameter: 10.67 mm
• Thermoplastic quick-connect fittings matched to the factory design

Detailed Description

Rein CHE0925 is engineered as an OE-style engine coolant hose for BMW cooling system service. It follows the original hose shape and branch configuration so it installs in the same routing as the factory part, making it a practical replacement for the expansion tank (upper) to cylinder heads connection. This part cross-references URO 17129845173 for the same application.

Compatible With BMW 230i, BMW 330i, BMW 430i, and related xDrive and Gran Coupe applications from 2017-2021, this hose is a direct-fit solution for maintaining proper coolant flow in the upper cooling circuit. The Rein CHE0925 part number is a useful reference when sourcing the correct replacement for BMW cooling system repair.

What This Part Helps Address

• Coolant leaks at the upper hose connection
• Cracked or brittle factory hose material
• Damaged quick-connect fittings
• Improper hose routing after cooling system service
• Loss of coolant circulation through the expansion tank to cylinder heads line

Installation Notes and Tips

Verify hose routing, connector style, and end diameters before installation. Inspect mating ports, retaining clips, and adjacent cooling components for wear or residue before fitting the new hose. Confirm the vehicle application by model year and position: Fits 2017-2021 BMW 230i, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2021 BMW 230i xDrive, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2020 BMW 430i, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2020 BMW 430i Gran Coupe, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2020 BMW 430i xDrive, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2020 BMW 430i xDrive Gran Coupe, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2019 BMW 330i GT xDrive, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2019 BMW 330i xDrive, Expansion Tank (Upper) To Cylinder Heads; Fits 2017-2018 BMW 330i, Expansion Tank (Upper) To Cylinder Heads.

Quality Assurance

Rein Automotive positions this hose as an OE-quality replacement for European vehicles, with dimensions and connector details matched to the original manufacturer design for consistent fitment and serviceability.