BMW F20 F21 F30 F31 LCI F32 F33 F34 Alternator Petrol Engine Unit 180A 8645325

BMW F20 F21 F30 F31 LCI F32 F33 F34 Alternator Petrol Engine Unit 180A is an original charging system component designed for BMW vehicles with petrol engines. It ensures a stable power supply to the electrical system and the battery, which translates into reliable operation of all onboard systems. This is a solution for users who expect factory-fit quality and predictable alternator performance parameters.

Specifications and technical data

• SKU: 8645325-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8645325
• Substitutable numbers: 12318645325, 8645325, 104211-0590
• Fuel type: Petrol
• Category: Alternators & Generators

Purpose and compatibility

The presented alternator belongs to the Alternators and generators group and has been designed for BMW F-series models, such as the F20, F21, F30, F31 LCI, F32, and F33 with petrol engines. The design provided by the manufacturer enables proper cooperation with factory engine accessories, maintaining correct charging parameters and communication with the vehicle's electronics.

The 180A capacity alternator is suitable for modern electrical systems that feature extensive comfort and safety equipment. As a result, it provides a solid foundation for maintaining stable voltage in the system, even under higher loads.

Technical and functional characteristics

The alternator designed for the petrol engine has been constructed to efficiently convert mechanical energy from the crankshaft into electrical energy, while maintaining an appropriate power reserve. The 180A capacity allows for the operation of many consumers simultaneously, such as control units, lighting, multimedia systems, or comfort features.

In practice, this means:

• stable battery charging under typical and increased electrical loads,
• proper cooperation with the petrol engine's control electronics,
• maintaining an appropriate safety margin when operating in variable conditions.

Thanks to the factory design, the alternator is optimized for mounting, accessory belt routing, and cooling, which promotes predictable durability and repeatable performance parameters.

Application in BMW petrol engines

In BMW vehicles with petrol units, the alternator plays a key role in powering ignition systems, engine controllers, and extensive onboard electronics. A properly selected charging system component helps reduce voltage drops that can affect engine performance and the operation of driver assistance systems.

Replacing the alternator with a model of the correct current capacity is particularly important in cars equipped with numerous energy consumers, where power stability translates into user comfort and reliability. Using an original solution from the BMW group allows for maintaining consistency with the vehicle's factory configuration.

Condition and benefits of choosing a used alternator

The offered alternator is a used component, which is a beneficial option for users looking for a factory component at a more affordable price than a new replacement. Choosing an original used alternator often means better fitment for a specific engine version than in the case of universal solutions.

The main advantages of such a solution include:

• preservation of the original design intended by the BMW manufacturer,
• compatibility with factory petrol engine accessories,
• the possibility of an economical repair of the charging system while maintaining an appropriate quality level.

BMW alternators and generators – expansion and service of the charging system

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 alternators, generators, or related charging system parts, check the available parts in the BMW Alternators and generators category.

For drivers interested in a broader look at the operation of drive systems and the electrical components that work with them, it may also be useful to read an analysis of various all-wheel-drive systems – more information can be found in the article xDrive, 4Matic, quattro or 4Motion – a comparison of AWD drives from BMW, Mercedes, Audi, and VW.