BMW E88 E90 E90 E91 LCI N43 Thermostat Heater Return Hose For Radiator 7552408

The BMW E88 E90 E91 LCI N43 Water Hose Pipe Conduit is an original part from the Cooling System Hoses and Pipes category, designed for use in the BMW engine cooling system with the N43 unit. This used OEM component ensures proper coolant flow, stable engine thermal operation, and correct fitment with the factory installation. It's a solution for users seeking a proven, factory-specification part for their facelifted BMW 1 and 3 Series E8x/E9x models.

Specifications and technical data

• SKU: 7552408
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7552408
• Substitutable numbers: 17127552408, 7552408, 755240803
• Category: Coolant Hoses

Application in BMW N43 Cooling System

The presented water pipe is a component of the cooling system responsible for the safe flow of coolant between the N43 engine components in BMW E88, E90, and E91 facelifted (LCI) models. Thanks to the original conduit geometry, the following are maintained:

• correct positioning relative to the engine block and accessories,
• appropriate cross-sectional diameter for fluid flow,
• compatibility with original cooling system spigots and connectors.

This precise fitment reduces the risk of leaks, facilitates installation, and helps maintain the engine's stable operating temperature.

Benefits of Using an Original BMW Conduit

Choosing an original BMW water conduit from this series primarily means reliable fitment with the cooling system and predictable performance under thermal load. In practice, this translates to:

• maintaining the N43 engine's factory cooling characteristics,
• reduced risk of engine overheating under heavy load,
• no need for installation modifications or custom brackets.

A used OEM part is a good choice for vehicle servicing where compliance with the original design and quick replacement without additional modifications are important.

Part Condition and Installation Aspects

This conduit belongs to the group of components designated as used BMW parts, meaning it comes from a dismantled vehicle and is intended for reinstallation after verification by a mechanic. During installation, it is recommended to:

• inspect the sealing surfaces and conduit ends,
• replace hose clamps or quick-connect fittings with new ones,
• check the system for leaks after filling with fresh coolant.

This approach helps maintain stable cooling system operation and reduce the risk of future leaks.

Cooling System Operation and Diagnostics

A functional water conduit directly impacts engine durability. Therefore, during any intervention in the cooling system, it's advisable to inspect other components – the radiator, thermostat, water pump, and other pipes. For users who want to better understand overheating symptoms and servicing principles, we recommend the article: Engine Cooling System – Overheating, Repair, and Used Radiators. This provides practical knowledge for planning repairs or upgrades to the cooling system in BMW vehicles.

Other BMW Cooling System Pipes and Hoses

If, during servicing, you find that you also need other parts from the BMW Cooling System Hoses and Pipes category, check the available assortment using the link: BMW Cooling System Hoses and Pipes. This will allow you to select complete sets of pipes for your model, facilitating comprehensive cooling system maintenance and reducing vehicle downtime in the workshop.