URO 11531721709 Radiator Coolant Hose - Lower

Radiator Coolant Hose for BMW 318i, 318is, 318ti

This URO radiator coolant hose is a direct-fit lower hose for select BMW 318i, 318is, and 318ti models. Built to OE dimensions and shape, part number 11531721709 supports straightforward replacement on applications with air conditioning and the specified production range.

Key Features

• Lower radiator coolant hose for select BMW 3 Series applications
• Precision-molded to OE dimensions and shape
• EPDM construction resists electrochemical degradation, heat, and ozone
• Temperature rating from -40°F to 275°F (-40°C to 135°C)
• Guaranteed fitment for listed applications
• 24-month, unlimited mileage warranty

Detailed Description

URO part number 11531721709 is a replacement radiator coolant hose engineered for the lower cooling circuit on select BMW 318i, 318is, and 318ti models. It is molded to match original equipment dimensions and routing, helping maintain proper coolant flow and a secure fit during service. The EPDM rubber construction is formulated to resist engine heat, ozone exposure, and electrochemical degradation that can break down hoses from the inside out.

This hose is listed for 1992-1994 BMW 318i and 318is, plus 1995 BMW 318i, 318is, and 318ti with air conditioning and production dates through 08-31-1995. If you are replacing a worn lower radiator hose on a BMW 318i lower cooling system, BMW 318is lower hose application, or BMW 318ti lower coolant hose setup, this part number 11531721709 matches the specified fitment.

This part cross-references Rein CHR0071R for the same application.

What It Helps Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the hose under heat
• Loss of proper coolant circulation in the lower cooling circuit
• Fitment issues caused by non-OE-shaped replacement hoses
• Rubber breakdown from heat, ozone, or electrolysis-related degradation

Installation Notes and Tips

Verify the vehicle’s production date and air conditioning configuration before ordering. Confirm the hose routing matches the original lower radiator hose on the vehicle, and inspect adjoining clamps, thermostat housing connections, and radiator necks for wear before installation. After installation, refill and bleed the cooling system according to BMW service procedures to remove trapped air.

Quality Assurance

URO backs this radiator coolant hose with a 24-month unlimited mileage warranty. The hose is manufactured to OE dimensions and shape for consistent fitment on the listed BMW applications.