Rein CHK0021 Radiator Coolant Hose Kit - Lower

OE-Style Lower Coolant Hose Kit for BMW X5

Rein CHK0021 is a specific-fit radiator coolant hose kit for the lower cooling circuit on 2001-2006 BMW X5 models. It is built as a direct replacement for the original hose assembly, with the temperature sensor pre-installed and thermoplastic quick-connect fittings for a factory-style connection.

Key Features

• Specific-fit lower radiator coolant hose kit for BMW X5 applications
• Pre-installed temperature sensor to reduce sensor reuse during service
• Black hose construction
• Thermoplastic quick-connect fittings for OE-style attachment points
• Direct replacement design for the original hose and hose assembly
• Part number CHK0021

Detailed Description

Rein CHK0021 is engineered for 2001-2006 BMW X5 lower hose service, including applications noted with a temperature switch and quick connectors. The hose follows the original shape and branch layout used on the OE assembly, which helps maintain proper routing and connection fitment in the BMW X5 cooling system. Rein CHK0021 also includes the temperature sensor already installed, which eliminates the need to transfer the old sensor during replacement.

This part cross-references Genuine 11537508688 for the same application.

What It Helps Address

• Cracked or aged lower radiator hose on BMW X5 models
• Coolant leaks at hose branches or connector points
• Faulty temperature sensor service caused by reusing an old sensor
• Improper fit from non-specific replacement hoses
• Cooling system maintenance on 2001-2006 BMW X5 vehicles

Installation Notes and Tips

Fits 2001-2006 BMW X5, lower. Confirm the hose routing, connector style, and sensor connection before installation. Inspect mating surfaces, clamps, and adjacent cooling components for wear or contamination before reassembly. CHK0021 is a specific-fit replacement, so verify the vehicle’s lower hose configuration matches the listed notes: Incl. Temp. Switch, w/Quick Connectors.

Quality Assurance

Rein supplies OE-quality cooling components for European vehicles, with replacement parts patterned after the original hose assembly dimensions and connection style. CHK0021 is built to match the OE application for BMW X5 cooling system service.