BMW E83 X3 Radiator Coolant Hose / Water Pipe – OEM Replacement Cooling System Hose, Replaces OE 11537572158 - Fits N45 & N46 Models

Restore proper coolant flow and cooling system reliability with this OEM replacement Radiator Coolant Hose / Water Pipe for select BMW 1 Series, 3 Series, and X3 models equipped with N45 and N46 engines. Designed to replace OE part number 11537572158, this hose plays an important role in routing coolant through the cooling system so the engine can maintain proper operating temperature under daily driving and changing load conditions.

As these vehicles age, factory coolant hoses can begin to harden, swell, weaken, or crack from repeated heat cycles and long-term coolant exposure. Once that happens, even a small weak point can quickly turn into a coolant leak, pressure loss, or overheating issue. Replacing aging coolant hoses before they fail is one of the smartest preventative maintenance steps you can take to protect the cooling system and avoid larger engine problems.

This replacement hose is designed to match the original fit and routing of the factory unit, making it a dependable solution whether you are fixing a leak, refreshing the cooling system, or replacing worn original hoses before they become a bigger issue. It helps restore confidence in the cooling system while keeping your BMW running at the proper temperature.

Key Features:

• Direct OEM Replacement: Designed to replace the factory radiator coolant hose / water pipe using OE part number 11537572158.
• Restores Proper Coolant Flow: Helps maintain stable coolant circulation and correct engine operating temperature.
• Ideal for Cooling System Refreshes: A smart replacement when servicing aging hoses, radiator components, thermostat work, or the full cooling system.
• Helps Prevent Leaks and Overheating: Replacing worn hoses can help reduce the risk of coolant loss and temperature-related engine problems.
• OEM-Style Fitment: Built to match the original hose routing and installation layout on compatible BMW applications.
• Reliable Preventative Maintenance Upgrade: A simple but important replacement part for preserving long-term cooling system reliability.

FITMENT:

• BMW 1 Series – E81 3 Door Hatchback
• BMW 1 Series – E87 5 Door Hatchback
• BMW 1 Series – E88 Convertible
• BMW 3 Series – E46 Sedan, Coupe, Touring, Convertible
• BMW 3 Series – E90 Sedan
• BMW 3 Series – E91 Touring
• BMW X3 – E83 SUV

Compatible with select BMW applications equipped with N45 and N46 engines using OE radiator coolant hose / water pipe 11537572158. If you’re unsure whether this hose fits your specific vehicle, please contact us with your VIN and we’ll be happy to verify compatibility before you order.

REPLACES OE PART NUMBER:
11537572158

Please refer to the “Fitment” section in the product description for compatibility details.