Rein CHR0401R Radiator Coolant Hose - Lower

OE-Style Lower Radiator Hose

Rein CHR0401R is an OE quality radiator coolant hose built for European vehicle cooling systems that need a direct-fit replacement. It is shaped to match the original hose routing and uses thermoplastic quick connect fittings for a cleaner service fit on BMW 525i, 525xi, 530i, and 530xi applications.

For BMW 525i lower radiator hose replacement and BMW 530i lower coolant hose service, CHR0401R helps restore proper coolant flow without trimming or refitting the hose.

Key Features

• Direct replacement radiator coolant hose for application-specific fitment
• OE-style shape and branch geometry for accurate routing
• Thermoplastic quick connect fittings help reduce installation time
• Resists heat, salt, road debris, oil, and other contaminants
• EPDM hose construction with SAE J20 R4 D1 compliance
• Black finish with a lower-position fitment design
• Maximum working pressure rated to 120 PSI

Detailed Description

Rein CHR0401R is a complete OE quality direct-fit radiator hose designed for European vehicles. The hose matches the original configuration, including the size and shape of the branches and the thermoplastic quick connect fittings, so it installs like the factory part. This makes it a practical choice for BMW 525i, 525xi, 530i, and 530xi lower radiator hose replacement work where correct fit and reliable sealing matter.

The EPDM construction is built for cooling-system service and exposure to common underhood contaminants. With a centerline length of 10.5 inches and 1.81-inch inside diameter ends, CHR0401R is engineered for the specified lower hose application and supports consistent coolant transfer in the radiator circuit. This part cross-references Genuine 17127521778 for the same application.

Common Problems This Hose Can Address

• Cracked, swollen, or leaking lower radiator hose
• Coolant loss from worn quick connectors or aged seals
• Improper fit after using a universal hose
• Extended repair time caused by cutting or refitting the hose
• Repeat cooling-system leaks from reusing old connectors and O-rings

Installation Notes and Tips

CHR0401R is a direct-fit replacement, so no cutting, refitting, or adjusting the hose is required. Inspect the mating surfaces, quick connectors, and sealing points before installation, and replace any damaged seals or connectors as needed to ensure a proper seal. Confirm lower-position routing against the vehicle’s original hose layout before final assembly.

Quality Assurance

Rein designs this hose as an OE-quality replacement for European vehicles, with factory-style dimensions and connector design for accurate fitment. It is backed by a 24-month or 24,000-mile warranty.