BMW X5 X6 E70 E71 M57N2 Alternator Generator 180A VALEO 7801173

Visual condition of the part

The product shows signs of use visible in the photos.

BMW X5 X6 E70 E71 M57N2 Alternator Generator 180A VALEO is an original component from the Alternators and generators group, designed for the charging system in BMW vehicles with the M57N2 engine. This used OEM part ensures proper electrical system performance, stable power supply for electrical consumers, and correct integration with onboard electronics.

Specifications and technical data

• SKU: 7801173-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7801173
• Substitutable numbers: 12317801173, 7801173
• Category: Alternators & Generators

Purpose and function in the electrical system

The VALEO alternator used in BMW X5 E70 and X6 E71 models with the M57N2 unit is responsible for generating electricity while the engine is running and maintaining the appropriate battery charge level. Thanks to its precise fit for the specific drivetrain configuration, it ensures:

• stable voltage across the entire load range of the system,
• correct cooperation with engine control and comfort systems,
• adequate power reserve for additional electrical consumers.

This solution is dedicated to BMW vehicles, which translates into a proper fit with mounts, the pulley, and the electrical wiring harness.

Benefits of using the VALEO alternator in BMW X5 / X6

Using the VALEO alternator in a BMW X5 E70 and X6 E71 with the M57N2 engine allows you to maintain charging system performance parameters consistent with factory standards. In practice, this means:

• proper operation of all comfort and safety systems (lighting, air conditioning, assistance systems),
• reduced risk of voltage drops under high electrical load,
• better protection of the battery against overcharging or undercharging,
• maintaining compatibility with factory BMW control unit settings.

As a result, this alternator is a suitable choice for charging system repairs in vehicles of this series when you want to maintain performance characteristics close to the factory assembly.

Product characteristics and fitment

The presented alternator comes from the BMW range and is an OEM component, which facilitates identification and selection based on the part number and interchangeable numbers available in the specification section. The product has assigned interchangeable numbers, allowing it to be matched to various equipment variants within the same engine family while maintaining compatibility with the factory installation.

In the technical description, you will also find the SKU designation and manufacturer information, which makes it easier to verify compatibility with your vehicle and compare it with the currently installed component.

Condition, verification, and service application

The alternator is a used component, which in practice means it has been removed from a vehicle and is intended for reinstallation after prior verification of compatibility. This type of component is a cost-effective service solution when you want to reduce repair costs while maintaining original BMW specifications.

Before installation, standard service procedures are recommended: checking the condition of electrical connections, the drive belt, and cooperating components in the charging system. A correctly selected alternator helps restore proper battery charging and stable electrical system operation without the need to modify factory design solutions.

Part selection and additional materials

To avoid mistakes when selecting an alternator for a specific version of the BMW X5 or X6, it is worth comparing the markings with the data in the technical specification and vehicle documentation. Expert tips on verifying OEM and interchangeable numbers may also be helpful – you can find them in the article No more bad purchases! How to professionally select used car parts, which discusses practical rules for verifying used components.

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