Alternator BMW G11 G12 LCI G20 G21 G30 G31 Alternator 250A Denso 8634167

Alternator BMW G11 G12 LCI G20 G21 G30 G31 Alternator 250A Denso is an original charging system component from the Alternators and generators category, designed for modern BMW premium and mid-range models. The high 250A current output ensures a stable power supply for extensive onboard electronics, comfort systems, and advanced safety features. This is a solution for users who expect proven Denso construction and factory compatibility with BMW electrical systems.

Specifications and technical data

• SKU: 8634167
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8634167
• Substitutable numbers: 8634167, 12318634167
• Category: Alternators & Generators

Purpose and compatibility with BMW models

The presented alternator has been designed for use in popular BMW 7 Series G11/G12 LCI, 3 Series G20/G21, and 5 Series G30/G31 models. This means it is perfectly matched to the new-generation electrical architecture, which experiences high current loads due to the presence of multimedia systems, advanced control units, extensive lighting, and numerous comfort features.

Thanks to the OEM Denso design, the alternator works seamlessly with the factory engine control and energy management system, which reduces the risk of diagnostic errors, improper battery charging, or electrical interference.

Operating parameters and advantages of the 250A alternator

A current output of 250A allows for a stable power supply to the vehicle even when multiple consumers are operating simultaneously, such as parking heaters, heated seats, premium audio systems, or advanced LED lighting. The current power reserve translates into a lower load on the alternator under typical driving conditions, which promotes durability and consistent charging parameters.

The Denso alternator is characterized by precise voltage regulation, which is essential for battery life and sensitive electronic control units. Stable voltage in the system helps to limit drops and spikes that could affect the operation of safety and comfort systems.

Construction, manufacturer, and build quality

The design is provided by Denso – a recognized supplier of electrical solutions for premium car manufacturers. Original OEM construction means maintaining factory mounting parameters, correct placement of mounting points, and proper electrical connectors, which facilitates installation in the engine bay without the need for modifications.

The alternator housing has been designed for effective cooling and resistance to operating conditions in the engine bay. A well-thought-out ventilation system and solid rotor bearings promote smooth operation at high RPMs and under long-term loads.

Condition, installation, and service application

The item is offered in used condition, which provides an attractive service solution for users looking for an original BMW alternator at a reasonable price. Choosing parts from this group allows you to maintain consistency with the vehicle's factory specifications, which is particularly important in cars equipped with extensive energy management systems.

The alternator is intended for direct installation in place of the factory component, provided that appropriate service procedures are followed (disconnecting the battery, checking charging voltage after installation, verifying the condition of the accessory belt). Proper selection of an original alternator minimizes the risk of compatibility issues and shortens repair time.

Support with selection and additional information

Before purchasing, it is worth verifying the compatibility of the alternator with your specific engine version and model year based on the VIN and BMW catalog data. This ensures that you select a component that will work with the existing engine equipment and electrical system without the need for adaptation.

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

To better understand how the use of original used components affects the vehicle's resale value, it is worth reading our guide: Original used parts vs. car resale price – how not to lose money?.