Housing BMW E81 E88 E87 E90 Petrol N45 N45N N46 Thermostat Housing 7572859

Housing BMW E81 E88 E87 E90 Petrol N45 N45N N46 Thermostat Housing is an original cooling system component from the Thermostats and housings category, designed for BMW N45, N45N, and N46 petrol engines. The housing design ensures precise coolant flow and stable integration with the thermostat, which translates into the correct operating temperature of the engine and safe operating conditions.

Specifications and technical data

• SKU: 7572859
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7572859
• Substitutable numbers: 7572859, 11517572859, 7506576, 11517506576
• Fuel type: Petrol
• Category: Thermostats & Housings

Purpose and function in the cooling system

The thermostat housing in BMW N45, N45N, and N46 petrol engines is responsible for the tight seating of the thermostat and the proper distribution of coolant between the engine block and other system components. A correctly selected housing supports:

• maintaining a stable engine operating temperature,
• reducing the risk of overheating under heavy loads,
• efficient engine warm-up after startup,
• even operation of the cooling system across the entire RPM range.

Thanks to its fitment for specific petrol engine families, the housing works with the factory cooling channel layout, which facilitates installation and reduces the risk of leaks.

Construction and compatibility with BMW models

The BMW thermostat housing for the E81, E88, E87, and E90 series has been designed as an OEM component, compatible with factory engine equipment. The geometry of the connectors, mounting points, and body shape are adapted to the stock cooling system, allowing for installation in place of the original part without the need for modifications.

This solution is particularly beneficial when servicing petrol units, where it is crucial to maintain proper coolant flow and correct positioning of sensors and hoses. The used OEM part retains the factory flow characteristics, which promotes stable engine operation in both city and highway conditions.

Operational characteristics and advantages of use

Replacing the thermostat housing with a component that is structurally consistent with the original allows for the restoration of proper cooling system operation in the event of leaks, cracks, or material wear. Using this housing in BMW petrol engines ensures:

• consistency with the factory cooling system and engine equipment,
• proper coolant flow within operating temperature ranges,
• the possibility of service replacement without interfering with the engine structure,
• preservation of the operating parameters specified by the vehicle manufacturer.

For users who operate their vehicle in varied conditions, a properly functioning thermostat housing is an essential element in maintaining stable engine temperature and reducing the risk of failures related to overheating.

Condition, origin, and installation aspects

The offered BMW thermostat housing comes from dismantling and is a used component, which allows for economical repair while maintaining the manufacturer's original specifications. This type of part is particularly attractive when servicing older E81, E88, E87, and E90 series models, where both technical compatibility and reasonable repair costs are important.

Before installation, a standard service procedure is recommended: checking the mating surfaces, selecting appropriate seals, and verifying the condition of hoses and clamps. Correctly performed installation promotes system tightness and long-term, stable operation of the petrol engine.

Complementary BMW cooling system components

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as other housings, thermostat inserts, or connection pipes, check the available parts in the BMW Thermostats and housings category.

To better plan vehicle service and approach the selection of used components consciously, it is worth familiarizing yourself with practical tips regarding part selection – the article Stock vs. sports suspension – differences in construction and is it worth buying used suspension parts? may be helpful, as it discusses, among other things, the assessment of component condition and the cost-effectiveness of using parts from dismantling.