BMW E81 E87 LCI E90 E91 E92 E93 Petrol N43 Alternator 170A 7550468

BMW E81 E87 LCI E90 E91 E92 E93 Petrol N43 Alternator 170A is an original component from the Alternators and generators group, designed for BMW petrol units with the N43 engine. This used OEM component ensures proper charging of the electrical system, stable operation of accessories, and compatibility with the vehicle's factory electronics.

Specifications and technical data

• SKU: 7550468
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7550468
• Substitutable numbers: 12317585940, 7585940, 12317550468, 7550468
• Fuel type: Petrol
• Category: Alternators & Generators

Purpose and function of the alternator

The alternator in a petrol engine plays a key role in powering all electrical consumers and charging the battery while the engine is running. For BMW 1 Series E81/E87 LCI and 3 Series E90 models with the N43 engine, a properly selected alternator with the correct current output is essential for the stable operation of control systems, comfort systems, and additional equipment.

The presented component has been designed specifically for use with petrol engines, which means it is matched to the load characteristics, rotational speed, and electrical system requirements of these units.

Benefits of using an original BMW alternator

Using an original alternator in BMW cars from the E81, E87 LCI, and E90 family allows you to maintain the factory operating parameters of the charging system. As a result:

• engine control units and safety systems receive stable power,
• the battery is charged according to the manufacturer's specifications,
• the risk of voltage drops and interference in the onboard electronics is reduced,
• compatibility with factory wiring harnesses and mounts is maintained.

A used OEM component is a solution that allows you to combine technical installation accuracy with a more favorable cost compared to new non-original replacements.

Technical characteristics and fitment

The 170A alternator has been configured for the energy demands typical of modern BMW petrol units with extensive electronics. The appropriate current reserve allows for powering standard consumers as well as additional equipment without overloading the charging system.

Original construction ensures:

• compliance with factory mounting points on the N43 engine,
• correct positioning of the pulley relative to other accessory components,
• fitment to standard electrical connectors in the engine bay.

Thanks to this, the installation process is predictable, without the need for system modifications or the use of additional adapters.

Application in petrol engines

The presented alternator is intended for vehicles powered by petrol, which is important for both operating characteristics and compatibility with the engine control system. Proper matching to the fuel type reduces the risk of improper charging, control unit errors, and excessive mechanical load on the accessories.

By choosing this model, the user receives a component prepared to work with a specific engine configuration, which translates into stable and predictable operation of the electrical system in daily use.

Condition, origin, and economic aspects

The offered alternator is a used part, sourced from a dismantled BMW vehicle, which allows for a favorable compromise between purchase cost and maintaining the manufacturer's original specifications. For many users, this is a sensible solution for charging system repairs, especially in cars used on a daily basis.

If you are considering whether a new or used part is a better choice, the following article discussing the differences in costs, quality, and durability may be helpful – check out the material: Car parts – new or used? We compare costs, quality, and durability.

BMW alternators and generators – expansion and modernization

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as different alternator variants, generators with different outputs, or compatible charging accessory components, check the available parts in the BMW Alternators and generators category.