BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A 7542529

BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A is an original component from the Alternators and generators group, designed for use in popular BMW 1, 3, 5, and 6 Series models. The high 155A current output ensures a stable power supply for the vehicle's electrical system, which is crucial for advanced onboard electronics.

Specifications and technical data

• SKU: 7542529-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7542529
• Substitutable numbers: 12317543083, 7543083, 12317542529, 7542529
• Category: Alternators & Generators

Purpose and compatibility

The presented alternator has been designed as a factory solution for selected versions of the BMW E60, E63, E87, E90, and E91 series. This ensures a proper fit for mounts, correct pulley geometry, and seamless integration with the factory charging and engine control system.

By utilizing an original BMW design, the alternator maintains the parameters required by the vehicle manufacturer, which translates into predictable electrical system behavior, proper battery charging, and stable operation of all electrical consumers.

Operating parameters and advantages of the 155A alternator

The 155A output allows for the safe operation of extensive comfort and safety systems, such as advanced multimedia systems, auxiliary heating, electric seats, driver assistance systems, or additional lighting. Power reserve is particularly important in cars used in urban traffic, where frequent starts and short trips place a heavy load on the charging system.

The alternator from this series has been constructed for long-term operation in variable temperature conditions, under high RPMs and heavy loads. Stable charging voltage reduces the risk of voltage drops, flickering lights, or issues with onboard electronics, which directly impacts driving comfort and safety.

Product characteristics and installation

The offered component comes from the BMW line and is assigned to a specific OEM part number and has interchangeable numbers, which facilitates verification of compatibility with a given vehicle. Before purchasing, it is recommended to compare the markings with the currently installed alternator or service documentation to ensure full compatibility.

As a used part, the alternator is a cost-effective solution while maintaining the manufacturer's original specifications. The factory design facilitates plug-and-play installation – after confirming the compatibility of mounts and electrical connectors, the replacement process is straightforward for an experienced mechanic, and vehicle downtime can be kept to a minimum.

Application in the BMW electrical system

The 155A alternator plays a key role in powering all electrical systems in the BMW E60, E63, E87, E90, and E91, from basic consumers to advanced control modules. A correctly selected and functional component minimizes the risk of starting problems, controller errors, engine stalling under high electrical load, or accelerated battery wear.

In vehicles equipped with numerous comfort and safety systems, a stable charging system is essential to maintain full vehicle functionality. Replacing a worn-out alternator with an original model of the appropriate output is one of the most effective methods of restoring the proper operation of the electrical system.

Expanding the BMW 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 pulleys, tensioners, or additional power cables, check out the available parts in the BMW Alternators and generators category.

For users interested in the topic of safely increasing power and selecting used components, expert materials may also be useful – more information on the practical approach to modifications and purchasing used parts can be found in the article 2.5 TFSI DAZA – how to safely increase the power of an Audi RS3 by buying used turbochargers.