Rein CHR0405R Radiator Coolant Hose - Upper

OE Quality Radiator Hose for BMW Cooling Systems

Rein CHR0405R is an OE-quality radiator coolant hose built for European vehicles that need a direct-fit replacement. It is shaped to match the original hose routing and uses thermoplastic quick connect fittings to simplify service on BMW cooling and HVAC heater hose applications.

Compatible With select BMW Z4, X1, 135i, 135is, 335i, 335i xDrive, 335is, 1 Series M, and 335xi models, this Rein radiator hose is engineered for accurate fitment and dependable sealing. The CHR0405R is a practical choice when replacing a worn upper hose on BMW cooling systems.

Key Features

• Direct replacement for OE radiator hose assemblies
• Thermoplastic quick connect fittings for a factory-style connection
• Reduces installation time by eliminating hose modification
• No cutting, refitting, or adjusting the hose during installation
• Helps prevent leaks and repeat repairs from reused quick connectors and O-rings
• EPDM construction resists heat, salt, road debris, oil, and other contaminants
• Built to SAE J20 R4 D1 standards
• Maximum working pressure: 120 psi

Product Details

Rein CHR0405R is a single radiator coolant hose with a black EPDM body, a centerline length of 11.25 inches, and two quick connect fittings. It is designed as a complete OE-quality direct-fit European hose, matching the original size and shape requirements for the application. This part cross-references Genuine 17127540127 for the same application.

What It Helps Fix

• Coolant leaks from an aging or cracked upper hose
• Fitment issues caused by stretched, hardened, or distorted OE hose material
• Repeat leaks from reusing old quick connectors or O-rings
• Extended installation time from hose trimming or refitting
• Cooling system service problems on BMW Z4, X1, 135i, and 335i applications

Installation Notes

Fits 2009-2016 BMW Z4, Upper; 2013-2015 BMW X1, Upper; 2008-2013 BMW 135i, Upper; 2013 BMW 135is, Upper; 2007-2013 BMW 335i, Upper; 2009-2013 BMW 335i xDrive, Upper; 2011-2013 BMW 335is, Upper; 2011 BMW 1 Series M, Upper; and 2007-2008 BMW 335xi, Upper. Verify hose routing and connector style before installation. The quick connectors are included for easy installation of the HVAC heater hose application noted in fitment data. No cutting or hose adjustment is required when the correct application is selected.

Quality Assurance

Rein Automotive OE-quality hoses are built to match original equipment dimensions and connector design for European vehicles. CHR0405R is backed by a 24-month or 24,000-mile warranty.