BMW E60 E81 E87 E90 E91 Thermostat Housing Water Coolant N43 Petrol 7552403

The BMW E60 E81 E87 E90 E91 N43 Petrol Thermostat Housing is a component from the Thermostats and Housings category, designed for N43 petrol engines in popular BMW 1, 3, and 5 Series models. This solution allows for the restoration of proper cooling system operation, stabilization of engine operating temperature, and reduction of the risk of engine overheating.

Specifications and technical data

• SKU: 7552403
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7552403
• Substitutable numbers: 7552403, 11537552403, 8671515, 11538671515
• Fuel type: Petrol
• Category: Thermostats & Housings

Application in N43 Engines and Compatibility

The thermostat housing is dedicated to N43 petrol units used in BMW 1 Series (E81, E87), 3 Series (E90, E91), and 5 Series (E60). The design intended for this type of engine ensures proper coolant flow and cooperation with the factory thermostat and temperature sensors. This maintains compatibility with the original cooling system operating characteristics, resulting in stable operating temperature and correct engine control unit operation.

Thermostat Housing Construction and Function

The thermostat housing plays a crucial role in the cooling system – it is responsible for the secure seating of the thermostat, proper fluid flow direction, and safe connection of radiator hoses to the engine block. For N43 engines, a correctly chosen housing is particularly important, as the cooling system works with advanced electronic control and precise temperature regulation. Using the appropriate housing helps maintain even engine heating, which contributes to smoother operation and reduces component wear.

Benefits of Installing an Original BMW Housing

Choosing an original BMW thermostat housing for an N43 engine allows you to maintain the original cooling system operating parameters. The main advantages of this solution include:

• secure fit to the cylinder head and cooling system hoses,
• maintenance of correct thermostat opening characteristics,
• stable engine operating temperature in urban and highway conditions,
• reduction of the risk of leaks and coolant spills.

As a result, the housing helps maintain engine efficiency and supports the proper functioning of the engine control system, which is sensitive to deviations in operating temperature.

Condition, Origin, and Service Purpose

The offered BMW thermostat housing is a used part, removed from a vehicle, and intended for reinstallation in vehicles with an N43 petrol engine. This is a practical service solution for users who want to restore the cooling system's functionality while maintaining the original manufacturer's specifications. This type of component is suitable for both routine replacement of a worn housing and for repairs related to engine overheating, reduced cabin heating performance, or problems with maintaining a constant operating temperature.

BMW Thermostats and Housings – Selecting Parts from One Category

If you are looking for other components from the BMW Thermostats and Housings category for your car, check out the available BMW Thermostats and Housings in our store to select cooling system components tailored to your specific model and engine version.

More About Servicing BMW 3 and 5 Series

When planning comprehensive service, it is also worth paying attention to electronics and comfort systems. We encourage you to read the guide on operation and repairs for 3 and 5 Series models, available here: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models. This will help you more easily plan service work that combines cooling system maintenance with other key components.