BMW E87 E90 E91 E92 E93 Alternator Generator Diesel 7802471

BMW E87 E90 E91 E92 E93 Alternator Generator Diesel is an original component from the Alternators and generators category, designed for BMW 1 Series and 3 Series diesel engines. Thanks to its factory design, it ensures stable charging of the electrical system, proper battery operation, and reliable power supply for all vehicle electrical consumers. This is a solution for users who expect a proven, factory-standard part for their charging system.

Specifications and technical data

• SKU: 7802471-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7802471
• Substitutable numbers: 7802471, 12317802471, 12317802927, 7802927
• Fuel type: Diesel
• Part type: Alternator
• Category: Alternators & Generators

Purpose and compatibility

The presented alternator is dedicated to BMW E87, E90, E91, E92, and E93 models with diesel engines. The design has been developed for specific powertrains and the electrical architecture of these generations, which translates into correct charging parameters and proper integration with the vehicle's electronics.

As a part from the Alternators and generators category, it is responsible for converting the engine's mechanical energy into electrical energy, powering both the battery and all key onboard systems – from engine control units and lighting to comfort features.

Key technical features of the alternator

The alternator has been specifically designed for operation in diesel engines, where electrical and thermal loads are higher than in gasoline units. The excitation system, rectifier bridge, and voltage regulator are selected to ensure stable voltage across a wide range of RPMs and loads.

• Adapted to diesel characteristics – appropriate current output at low and medium RPMs.
• Factory mounting geometry – perfect fit for original brackets and accessory belt drive.
• Proper integration with BMW's factory control systems and electrical installation.

As a result, the alternator can be used as a direct replacement for the factory-installed unit, without the need for system modifications or additional mechanical adaptations.

Condition, functionality, and service application

The offered item is in used condition, meaning it has been removed from a vehicle and is intended for users looking for an economical yet original-compliant solution. This type of part is excellent for maintenance repairs when the existing alternator shows signs of wear, such as voltage drops, bearing noise, or battery charging issues.

Choosing an original alternator from the secondary market allows you to maintain the factory characteristics of the charging system, which is particularly important in modern BMW vehicles, where power stability has a direct impact on the lifespan of control units, sensors, and other electronic components.

Benefits of using an original BMW alternator

Using an alternator dedicated to specific BMW E87–E93 models offers a number of practical benefits:

• Factory fitment – compatibility with mounting systems, belt routing, and the vehicle's electrical installation.
• Stable charging – correct operating parameters under typical diesel engine usage conditions.
• Seamless electronic integration – proper cooperation with BMW diagnostic systems and control units.
• Reasonable repair cost – a used OEM part allows you to reduce expenses while maintaining an appropriate level of quality.

Charging system expansion and additional materials

If you are planning a comprehensive repair or upgrade of your BMW's engine bay and need other components from the same group, such as additional generators, mounting hardware, or accessories related to the charging system, check out the available parts in the BMW Alternators and generators category.

For users interested in a broader context of selecting BMW engine accessories, including turbochargers and intercoolers in modern units, the Global Parts guide may be helpful – BMW B58 code: 340 HP from the secondary market – a checklist before buying a turbo and intercooler for the BMW 3 Series (G20), which shows how to consciously approach the purchase of key powertrain components and how to verify their compatibility.