Description
Alternator Support BMW E90 F10 E81 Diesel N47 N57 Engine Bracket Mount is an original mounting component from the Brackets, mounts and mounting parts group, designed for BMW N47 and N57 diesel engines. It provides stable, precise support for the alternator, which ensures correct accessory belt tension and safe operation of the charging system in BMW diesel vehicles.
Specifications and technical data
- SKU: 7802639-2
- Mark: BMW (Genuine OE)
- Condition: Used
- OEM Part Number: 7802639
- Substitutable numbers: 7802639, 11167802639
- Fuel type: Diesel
- Category: Mounts, Brackets & Hardware
Purpose and function of the alternator support
The alternator support in BMW N47 and N57 engines is responsible for the rigid, axial positioning of the alternator relative to the crankshaft and other accessory components. A correctly selected and installed component:
- maintains the alternator in a stable position during the operation of the diesel engine,
- ensures proper routing of the drive belt,
- minimizes vibrations transmitted to the alternator and adjacent components,
- reduces the risk of premature wear of the alternator bearings and the tensioner.
As a result, the support is an important structural element in the engine accessory area, influencing the reliability of the charging system and the comfort of vehicle operation.
Compatibility with BMW N47 and N57 diesel engines
The presented support has been designed to work with BMW diesel units from the N47 and N57 families, used in popular 1, 3, and 5 series models, among others. Proper matching of the mounting geometry and bolt points to the engine block ensures that this component integrates with the factory accessory system without the need for modifications.
To confirm compatibility with a specific engine version and vehicle year, it is worth using the VIN and OEM number. A detailed guide available in the article Guide: how to choose the right car part by VIN and OEM number, which describes step-by-step how to verify the compatibility of used parts, will be helpful.
Characteristics of the mounting component
As a component from the Brackets, mounts and mounting parts group, the alternator support is responsible for transferring mechanical loads from the alternator to the engine block. The construction is prepared to work in the demanding thermal and mechanical conditions typical of diesel units, where higher torque and intense vibrations occur.
Key advantages of this solution include:
- factory fitment to the BMW accessory system,
- maintenance of the correct belt routing geometry,
- suitability for use in the process of repair or engine accessory replacement,
- consistency with the manufacturer’s original design concept.
Used condition and mounting aspects
The offered alternator support is a used part, which allows for an economical repair of the accessory system while maintaining the manufacturer’s original specifications. Before installation, it is recommended to:
- inspect the contact surfaces with the engine block,
- check the threads for any potential damage,
- use the appropriate tightening torques in accordance with BMW service documentation,
- verify the condition of the drive belt and tensioner during replacement.
Such an approach increases the chance of long-term, trouble-free operation of the charging system after the repair is completed. Additional tips regarding the use of dismantled parts can be found in the article How to extend the life of used car parts?, which describes practical methods for maintaining mechanical components.
Support with selection and expansion of the BMW mounting system
In case of any doubts regarding the selection of the appropriate alternator support for a specific BMW model, it is worth preparing the vehicle’s VIN and information about the diesel engine used. This will facilitate precise matching of the component to the existing accessory system and reduce the risk of incorrect installation.
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 additional brackets, mounts, or accessory mounting parts, check the available parts in the BMW Brackets, mounts and mounting parts category.
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