BMW E46 E87 E90 116i 316i Petrol N45 N45N Coolant Thermostat 7500597

BMW E46 E87 E90 116i 316i Petrol N45 N45N Thermostat 7500597 is an original cooling system component from the Thermostats and Housings group, designed for BMW petrol engines. It ensures stable maintenance of the engine's operating temperature, which translates to proper engine operation, optimal fuel consumption, and reduced risk of overheating.

Specifications and technical data

• SKU: 7500597-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7500597
• Substitutable numbers: 11517500597, 7500597, 11517572859, 7572859, 75515694490533, 11517506576, 7506576
• Fuel type: Petrol
• Category: Thermostats & Housings

Application and Function in the Cooling System

The presented thermostat is a control element for the coolant flow in BMW N45 and N45N series petrol engines, used in models such as 116i and 316i. It is responsible for the controlled opening of the cooling circuit depending on the temperature, allowing for rapid achievement of operating temperature after startup and its stable maintenance during driving.

A properly functioning thermostat:

• reduces the risk of engine overheating under heavy load,
• ensures even heating of the engine,
• supports the proper operation of the lubrication and combustion systems,
• indirectly affects fuel consumption and component durability.

Original Origin and Technical Compatibility

The thermostat comes from the BMW offering, which means it maintains factory operating parameters and is fully compatible with the N45/N45N engine design. As a part from the Thermostats and Housings group, it is designed to work with the original cooling system, without the need for installation modifications or additional adjustments.

The component has a dedicated OEM part number and assigned replacement numbers, making it easy to verify its compatibility with a specific engine version and vehicle year. This is particularly important for petrol engines, where the operating temperature range is precisely matched to the engine's operating characteristics.

Characteristics of the Used Component

The offered thermostat is a used component, sourced from disassembly. This type of OEM part retains its original geometry, mounting points, and connection method to the cooling system, which facilitates installation and minimizes the risk of fitting issues. For many users, this represents a reasonable compromise between repair cost and maintaining factory operating parameters.

Choosing a used OEM thermostat is particularly beneficial in situations where maintaining the original manufacturer's specifications is important, while also limiting service costs compared to new aftermarket parts of unknown origin.

Benefits of Using an Original BMW Thermostat

Using an original thermostat in a BMW petrol engine offers a number of practical benefits:

• Stable engine operating temperature – correct opening and closing of the cooling circuit according to manufacturer specifications.
• Full integration with the factory cooling system – no need for hose or housing adaptations.
• Consistency with engine control unit maps – proper cooperation with the engine control electronics.
• Reduced risk of improper engine warming or cooling, which can affect fuel consumption and emissions.

For users who want to better understand the importance of original components in the powertrain, the article may be helpful: OEM Quality and Safety Guarantee – Why Used Original Car Parts Are the Best Choice for Your Car?.

BMW Cooling System Expansion – Related Components

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as thermostat housings, connection pipes, or additional fluid flow control modules, check the available parts in the BMW Thermostats and Housings category.