BMW E87 E90 EGR Coolant Thermostat Exhaust Gas Cooling M47N M57N 7787870

BMW E87 E90 EGR Valve Cooler Thermostat Exhaust Gas M47N M57N is a component from the Thermostats and Housings category, designed for the exhaust gas recirculation system in BMW diesel engines. It enables proper control of coolant flow through the EGR exhaust cooler, contributing to stable engine operation and reduced emissions.

Specifications and technical data

• SKU: 7787870
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7787870
• Substitutable numbers: 11717787870, 7787870
• Category: Thermostats & Housings

Purpose and Function in the EGR System

The EGR exhaust cooler valve thermostat in BMW E87 and E90 models is responsible for controlling the temperature of exhaust gases directed through the EGR cooler. This allows the exhaust gas recirculation system to operate within an optimal temperature range, resulting in:

• stable engine operating temperature under various loads,
• more predictable EGR system operation,
• reduced risk of overheating components working with the exhaust cooler.

In M47N and M57N engines, a properly functioning EGR thermostat is crucial for maintaining correct combustion characteristics and ensuring proper engine control system operation.

Construction and Fitment for BMW E87 / E90

The offered component has been designed by BMW for integration with the factory cooling and exhaust gas recirculation system. The thermostat's construction is adapted to the specific routing of cooling lines and the geometry of the exhaust cooler in M47N and M57N units, facilitating installation in the original location.

Precise fitment for the E87 and E90 platforms ensures the preservation of factory seal integrity and correct coolant flow. This is particularly important in vehicles operated in varied thermal conditions, where the cooling system experiences significant load fluctuations.

Performance Characteristics and Benefits of Installation

Replacing a worn EGR thermostat with a functional component restores proper regulation of exhaust gas temperature directed through the cooler. In practice, this can bring the following benefits:

• smoother engine operation at low and medium loads,
• reduced risk of excessive heating of the exhaust cooler and adjacent components,
• better compatibility with the factory engine control unit software,
• reduction of potential errors related to incorrect exhaust gas temperatures in the EGR system.

For users who wish to maintain the factory configuration of the exhaust gas recirculation system, using a dedicated thermostat is a solution consistent with the vehicle manufacturer's intentions.

Product Condition and Service Application

The component is offered as used, making it an attractive cost-effective alternative compared to new parts, while retaining the original design. This type of part can be used for both standard EGR system repairs and comprehensive exhaust cooling system servicing in M47N and M57N engines.

Before installation, standard verification of connection tightness and inspection of associated hoses and clamps are recommended to ensure the proper operation of the entire system after replacement.

BMW Thermostats and Housings – Selection and Additional Information

If you are looking for other BMW Thermostats and Housings compatible with specific models of this brand, check out our dedicated category: BMW thermostats and housings. You will find a wide selection of cooling system components there, making it easier to choose the right solution for your engine.

If you are wondering when it is worth choosing a used part versus a new one or an aftermarket alternative, an article comparing different types of components in terms of cost and fitment might be helpful: Original, aftermarket, or used – which car parts are most cost-effective?. This will help you make a more informed service decision for your BMW.