BMW 1 3 E81 E87 LCI E90 E91 N43 Alternator Generator 170A Petrol NAPA NAL1250

BMW 1 3 E81 E87 LCI E90 E91 N43 Alternator Generator 170A Petrol is an efficient charging system component designed for BMW petrol engines, ensuring a stable power supply for the vehicle's electrical system. As part of the Alternators and generators group, it has been engineered for reliable operation with the N43 engine unit and demanding onboard electronics. This used component is a sensible choice for technically conscious repairs or upgrades to the charging system.

Specifications and technical data

• SKU: 7550468-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7550468
• Substitutable numbers: 12317585940, 7585940, 12317550468, 7550468, NAL1250, 467896, BG
• Fuel type: Petrol
• Category: Alternators & Generators

Purpose and operating parameters

The presented alternator is dedicated to BMW vehicles with the N43 petrol engine, used in models such as the E87 LCI and E90 series. A high current output of 170 A allows for the safe operation of an extensive electrical system, including comfort systems, safety features, and additional power consumers.

The alternator has been constructed to maintain stable charging voltage across a wide range of loads, which reduces the risk of voltage drops, starting issues, and malfunctions of electronic control units. This is particularly important in modern vehicles where the charging system works in conjunction with advanced energy management systems.

Construction and technical compatibility

This model belongs to the Alternators and generators group and is manufactured to a standard corresponding to parts installed at the factory in BMW vehicles. The design provides for cooperation with the N43 engine belt drive and integration with the factory wiring and vehicle control systems. As a result, installation is straightforward, with no need for system modifications.

The alternator has an assigned OEM part number and a set of interchangeable numbers, which facilitates verification of compatibility with a specific car configuration. Before purchasing, it is recommended to compare the markings with the vehicle data to confirm full mechanical and electrical compatibility.

Application in petrol engines

The device is designed for use with petrol engines, where the electrical load characteristics and charging system control methods differ from those of diesel units. Proper matching of the alternator to the fuel type is important for the durability of the component, the correct operation of the voltage regulator, and the stability of battery charging parameters.

In the case of N43 units, the alternator must meet the requirements associated with operation in varied RPM conditions, frequent engine starting, and the support of numerous power consumers. The presented model has been designed specifically for such operating conditions.

Benefits of using a pre-owned alternator

Choosing a used BMW alternator is a solution that allows you to reduce repair costs while maintaining compliance with the vehicle's factory specifications. The original design ensures proper fitment to mounts, correct pulley alignment, and proper connection of power and control cables.

Using recycled parts also aligns with an eco-friendly approach, reducing waste and raw material consumption. If you would like to learn more about the conscious selection of components and the impact of such decisions on the environment, it is worth reading the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts.

Support for selection and charging system upgrades

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