Rein CHR0397 Radiator Coolant Hose - Upper - Radiator To Pipe

OE Quality Radiator Hose for Audi A4

Rein CHR0397 is an OE-quality radiator coolant hose built for European cooling systems that require a direct-fit replacement. It is shaped to match the original hose routing for the upper radiator-to-pipe position on select Audi A4 and Audi A4 Quattro models from 2005-2009.

For Audi A4 radiator hose replacement work, CHR0397 helps restore proper coolant flow with a direct-fit design and thermoplastic quick connect fitting. The EPDM construction is made to resist heat, salt, road debris, oil, and other contaminants found in daily driving.

Key Features

• Direct replacement radiator coolant hose for European applications
• OE-style shape and branch sizing for accurate fitment
• Thermoplastic quick connect fitting for the specified connection point
• EPDM hose material for cooling-system durability
• Black finish with application-specific design
• Reduces installation time by eliminating hose cutting and refitting
• Helps prevent leaks caused by reusing old quick connectors and O-rings

Detailed Description

Rein CHR0397 is a radiator coolant hose engineered as a direct OE-style replacement for the upper radiator-to-pipe location. It matches the original hose layout used on 2005-2009 Audi A4 and 2005-2009 Audi A4 Quattro models, making it a practical choice for Audi A4 upper radiator hose replacement and related cooling-system service. The hose is built from EPDM and uses a quick connect fitting to follow the factory connection style.

This part cross-references Genuine 8E0121101R for the same application. Rein CHR0397 is also identified as a complete OE quality direct-fit European hose, with dimensions and connector style aligned to the original design.

Common Problems This Hose Can Address

• Coolant leaks at a worn or cracked upper radiator hose
• Fitment issues from using a universal hose in a factory-shaped application
• Slow installation caused by trimming or adjusting the hose
• Repeat leaks from reusing aged quick connectors or O-rings
• Heat and contamination damage to an original EPDM hose

Installation Notes and Tips

Before installation, verify the hose routing, connector style, and position against the removed part. This hose is application-specific and uses a factory-style quick connect design, so proper seating of the connector and inspection of the sealing surfaces are important for a secure repair. Confirm compatibility with the upper radiator-to-pipe location on the listed Audi A4 and Audi A4 Quattro models before service.

Quality Assurance

Rein designs this radiator hose as an OE-quality replacement for European vehicles, with factory-matched shape and connector style. CHR0397 includes a 24-month or 24,000-mile warranty.