Rein CHR0345R Radiator Coolant Hose - Upper - Tank To Thermostat Housing

OE Quality Radiator Hose for BMW X3

The Rein CHR0345R radiator coolant hose is a direct-fit replacement for the upper tank-to-thermostat housing hose on select 2004-2006 BMW X3 models. Built to OE dimensions with thermoplastic quick connect fittings, it supports a clean, factory-style repair for BMW X3 cooling system service.

For BMW X3 owners searching for a radiator coolant hose replacement, CHR0345R is designed around the original hose layout and connection points. The result is a straightforward service part for restoring proper coolant routing in the engine cooling system.

Key Features

• Direct replacement for the OE radiator hose assembly
• Fits 2004-2006 BMW X3, upper - tank to thermostat housing
• Thermoplastic quick connect fittings for OE-style connection points
• EPDM hose construction with resistance to heat, salt, road debris, oil, and other contaminants
• SAE J20 R4 D1 compliant
• Maximum working pressure: 120 psi
• Black hose finish with OE-style dimensions and branch geometry
• Part number CHR0345R for catalog and service reference

Detailed Description

Rein CHR0345R is an OE quality radiator coolant hose engineered for European vehicle applications where factory fit and connection style matter. It is built as a direct replacement for the original hose assembly, matching the size, shape, and connector style specified for the application. This helps maintain proper coolant flow between the tank and thermostat housing on the BMW X3.

The hose uses EPDM material for durability in high-temperature engine bay conditions and includes thermoplastic quick connect fittings to match the OE design. For technicians and DIY repairs, this BMW X3 radiator hose replacement reduces the need for trimming, refitting, or adapting the hose during installation.

This part cross-references Genuine 11533400207 for the same application. CHR0345R is a practical choice when replacing a worn or leaking upper coolant hose on 2004-2006 BMW X3 models.

Common Problems This Part Can Address

• Coolant leaks at the upper radiator hose connection
• Cracked or hardened hose material from heat cycling
• Damaged quick connect fittings or worn sealing surfaces
• Improper hose fit after prior repair attempts
• Cooling system service on a BMW X3 with OE-style routing

Installation Notes and Tips

Fits 2004-2006 BMW X3, upper - tank to thermostat housing. Verify connector condition and sealing surfaces before installation, and inspect the mating components for wear or contamination. Because this hose uses OE-style quick connect fittings, proper alignment at the connection points is important for a secure seal.

Part number CHR0345R is intended for direct-fit service on the listed BMW X3 applications. Confirm the vehicle year and hose position before ordering to match the cooling system layout.

Quality Assurance

Rein Automotive OE quality hoses are built to match original equipment fitment and connection design for European vehicles. CHR0345R is backed by a 24-month warranty with 24,000-mile coverage.