BMW 1 3 Series E87 E90 E91 E92 E93 Diesel M47N2 M57N2 Alternator 150A 7802927

BMW 1 3 Series E87 E90 E91 E92 E93 Diesel M47N2 M57N2 Alternator 150A is a used, original alternator designed for BMW 1 and 3 Series diesel engines. It ensures stable charging of the electrical system and the battery, which is crucial for the reliable operation of all onboard systems. Thanks to its high current output, it provides a solid foundation for both daily use and more demanding electrical systems.

Specifications and technical data

• SKU: 7802927
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7802927
• Substitutable numbers: 12317802927, 7802927, AS
• Fuel type: Diesel
• Category: Battery Accessories

Application in BMW diesel models

The presented alternator is designed for Diesel M47N2 and M57N2 engines used in the BMW 1 Series E87 and 3 Series E90, E91, E92, and E93. The design has been developed to meet the requirements of these engines, which translates into proper cooperation with factory equipment, correct charging voltage, and compatibility with the vehicle's electronics.

The alternator belongs to the Battery Accessories category, responsible for effectively replenishing energy in the battery while the engine is running. This is particularly important in modern BMWs, where extensive electronics, comfort systems, and safety features generate high demand for stable power supply.

Construction and operating parameters of the alternator

The 150 A output alternator has been designed to provide sufficient power reserve for factory electrical equipment as well as additional consumers, such as advanced audio systems or extra comfort modules. The excitation and voltage regulation system works with the vehicle's control electronics, keeping charging parameters within a safe range for the battery and the electrical system.

The alternator housing is adapted to the factory mounting points in M47N2 and M57N2 engines, which facilitates installation and ensures correct accessory belt tension. The design solutions used allow for effective heat dissipation, which is important during long-term operation under load.

Benefits of using an original BMW alternator

Choosing an original BMW alternator translates into several significant operational benefits:

• precise fit for M47N2 and M57N2 diesel engines in terms of mounting and accessory geometry,
• proper cooperation with the factory charging control and electrical system,
• stable battery charging parameters under typical and increased loads,
• reduced risk of interference with onboard electronics.

As a result, this alternator is a functional service solution when replacing a worn unit in BMW 1 and 3 Series cars with diesel engines.

Condition, verification, and selection of parts

The offered alternator is a used component, which allows for an economical repair of the charging system while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a standard check of the vehicle's electrical system, the condition of the accessory belt, and ground connections to fully utilize the component's capabilities.

For the correct selection of an alternator for a specific BMW unit, it is worth verifying compatibility with the engine, model year, and vehicle equipment. The product has a dedicated OEM part number and interchangeable numbers, which facilitates identification and comparison with the currently installed component.

BMW Battery Accessories – expansion and service of the power system

If you are planning a comprehensive repair or upgrade of the electrical power area in your BMW and need other items from the same group, such as power cables, terminals, or additional fuses, check out the available parts in the BMW Battery Accessories category.

More about improving performance and using used components

If you are considering a broader car upgrade and want to better understand how to use used components in safe tuning, a guide describing a practical approach to increasing engine power and optimizing accessories may be helpful. You can find more information in the article How to increase engine power: a practical guide to engine tuning with used parts, which discusses the key aspects of such modifications step by step.