BMW Heater Core Coolant Hose Replacement – Restores Heating & Cooling System Performance – E46 316i 318i M43 / Replaces Part No. 64218377783

Restore proper heater and cooling system performance with this replacement BMW heater core coolant hose. This hose helps route coolant through the heater core circuit, allowing your BMW to provide proper cabin heat while maintaining consistent coolant flow through the cooling system.

Over time, factory heater hoses can become brittle, cracked, swollen, or weakened from repeated heat cycles, coolant pressure, age, and exposure to engine bay temperatures. A failing heater core coolant hose can cause coolant leaks, low coolant warnings, poor cabin heat, overheating concerns, or cooling system pressure loss.

This replacement heater core coolant hose is ideal for repairing leaks, replacing aging cooling system components, or completing preventative maintenance on compatible BMW E46 models equipped with the M43 engine.

Key Features:

• Replacement heater core coolant hose
• Restores proper heater core coolant flow
• Supports cabin heating and cooling system performance
• Helps maintain stable engine operating temperatures
• Helps prevent coolant leaks, low coolant warnings, and pressure loss
• Ideal for replacing brittle, cracked, swollen, or leaking heater hoses
• Designed for compatible BMW E46 316i and 318i M43 models
• Direct-fit replacement with no modifications required
• Replaces Part No. 64218377783

FITMENT: BMW 3 Series – E46

• BMW 3 Series – E46
  316i / 318i with M43 engine

Compatible with applicable E46 316i and 318i models equipped with the M43 engine using this heater core coolant hose setup.

Please verify your original part number, hose shape, and connector style before ordering to confirm compatibility.

Replaces Part No. 64218377783

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