BMW E81 E87 LCI E90 E91 Petrol N43 Alternator Generator 170A Denso 7550468

BMW E81 E87 LCI E90 E91 Petrol N43 Alternator Generator 170A Denso is an original component from the Alternators and generators group, designed for N43 petrol engines in popular BMW 1 and 3 series models. This used Denso alternator ensures a stable power supply for the vehicle's electrical system and proper battery charging, while maintaining factory performance parameters. It is an ideal solution for users who expect a proven design at a reasonable price.

Specifications and technical data

• SKU: 7550468-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7550468
• Substitutable numbers: 7550468, 12317550468
• Fuel type: Petrol
• Category: Alternators & Generators

Purpose and compatibility

The alternator has been designed to work with the N43 petrol engine used in the compact BMW E81, E87 LCI, E90, and E91 models. The Denso design is matched to the factory mounts, accessory belt system, and electrical installation of these vehicles, which facilitates installation and reduces the risk of fitment issues.

The device belongs to the Alternators and generators group, responsible for generating electricity for all onboard systems – from engine control units and lighting to comfort equipment.

Operating parameters and role in the electrical system

The 170A capacity alternator is adapted to the load typical of modern BMW models equipped with extensive electronics. Such a power reserve allows for stable vehicle operation even when using multiple electrical consumers simultaneously, such as heated windows, audio systems, or additional comfort modules.

In practice, this means:

• reliable battery charging in typical urban and extra-urban conditions,
• appropriate voltage stability for sensitive electronic control units,
• maintaining operating characteristics in accordance with the manufacturer's factory specifications.

Design and advantages of the Denso construction

Denso alternators used by BMW are characterized by a compact design, optimized cooling, and refined control electronics. As a result, they work well with energy management systems in vehicles that dynamically adjust the alternator load to current needs.

Key advantages of this design include:

• a compact housing that facilitates installation in the engine bay,
• a design adapted for operation with the N43 petrol engine,
• factory compatibility with the electrical system of the BMW E81/E87 LCI/E90/E91 series.

Condition, verification, and practical application

The offered alternator is a used component, which allows for lower repair costs while maintaining the original manufacturer's specifications. This type of part is particularly attractive for maintenance repairs when the priority is to efficiently restore the full functionality of the charging system.

Before installation, it is recommended to perform a standard check of the vehicle's electrical system, the condition of the accessory belt, and the tensioner so that the newly installed alternator can operate under stable conditions. Proper selection by OEM number or VIN helps avoid compatibility issues and ensures the correct operation of the charging system.

Selection by OEM number and technical support

When choosing an alternator for a BMW, it is worth verifying compatibility by OEM number and vehicle data. A detailed guide on selecting parts by factory numbers may be helpful – you can find it in the article Guide: how to choose the right car part by VIN and OEM number, where the verification process and a list of questions worth asking the seller are described step by step.

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 alternators with different capacities, generators for other engine versions, or additional charging equipment components, check the available parts in the BMW Alternators and generators category.