BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator VALEO 170A 7802929

BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator VALEO 170A is an original charging system component from the Alternators and generators category, designed for selected BMW 5 and 7 series models with M57N and M57N2 diesel engines. This used OEM component ensures proper electrical system performance, stable battery charging, and correct integration with the vehicle's onboard electronics.

Specifications and technical data

• SKU: 7802929
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7802929
• Substitutable numbers: 12317802929, 7802929, C543305A, EM
• Category: Alternators & Generators

Purpose and compatibility

The presented compact generator is designed for use in BMW 5 series E60/E61 and BMW 7 series E65 vehicles equipped with M57N and M57N2 engines. The alternator's design is tailored to the requirements of diesel units that generate high electrical loads (glow plug systems, extensive electronics, additional power consumers).

The VALEO 170A designation indicates a high rated current, suitable for premium-class vehicles featuring numerous energy consumers – from comfort systems to advanced control modules. As a result, the alternator performs reliably both in daily operation and during intensive vehicle use.

Construction and operating parameters

As a compact VALEO generator, the alternator features a space-saving design optimized for installation in the engine bay of modern M57N/M57N2 units. The technology used ensures:

• stable charging voltage across a wide engine speed range,
• efficient operation under high electrical load,
• proper cooperation with the factory BMW regulator and control units.

Thanks to the original OEM design, the correct mounting points, pulley geometry, and cable routing are maintained, which facilitates installation and minimizes the risk of accessory belt tension issues.

Benefits of using an original BMW alternator

Using an original VALEO alternator in BMW 5 and 7 series with M57N/M57N2 engines allows you to maintain the integrity of the entire powertrain and electrical system. Key advantages include:

• Factory fitment – maintaining the correct position relative to the accessory belt and other engine components.
• Stable electrical system operation – reduction of voltage drops, lighting flickering, and control unit errors.
• Better compatibility with BMW electronics – the alternator is designed for specific charging strategies used in these models.
• Reduced risk of incompatibility, which is typical for generic aftermarket replacements.

A used OEM component is a reasonable compromise between cost and quality – you retain the manufacturer's original specifications while optimizing your repair budget.

Condition, verification, and service application

The alternator is offered as a used part, which means it has been removed from a vehicle and is intended for further use after proper installation and basic service inspection. This type of component is excellent for:

• routine maintenance of the charging system,
• restoring vehicle functionality after an alternator failure,
• optimizing service costs while maintaining original BMW specifications.

Before installation, it is recommended to perform a standard verification of the vehicle's electrical system (condition of the battery, ground cables, accessory belt) to ensure proper operating conditions for the alternator and avoid secondary faults.

Support with selection and additional information

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 with different mounting types, or compatible charging system parts, check the available parts in the BMW Alternators and generators category.

To better plan your repair and understand the impact of using original used components on the vehicle's resale value, it is worth reading our guide: Original used parts vs. car resale value – how not to lose money?.