MINI Cooper One D R55 R56 Alternator Generator Diesel 150A 7794970

MINI Cooper One D R55 R56 Alternator Generator Diesel 150A is a component from the Alternators and generators category, designed for the electrical system of Mini vehicles with a diesel engine. It offers stable charging for the onboard electrical system, ensuring an adequate power reserve for electrical and electronic consumers during daily operation.

Specifications and technical data

• SKU: 7806779
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7806779
• Substitutable numbers: 12317806779, 7806779, 7794970
• Fuel type: Diesel
• Category: Alternators & Generators

Purpose and compatibility

The presented alternator has been designed for MINI Cooper One D models of the R55 and R56 generations powered by a diesel engine. Operating parameters are tailored to the characteristics of the diesel unit, which translates into proper battery charging both in city traffic and on longer routes.

The 150A capacity alternator provides sufficient power reserve for factory electrical equipment, as well as for additional consumers, such as advanced audio systems or user-installed accessories, provided that the correct installation configuration is maintained.

Technical and functional characteristics

As a component from the Alternators and generators category, this unit is responsible for converting mechanical energy from the crankshaft into electrical energy, stabilizing the voltage in the vehicle's electrical system. The integrated voltage regulator (depending on the specific factory-fitted version) works with the car's electronics, keeping charging parameters within a safe range.

The alternator is adapted to operate in the demanding conditions of a diesel engine compartment – it accounts for elevated temperatures, vibrations, and variable electrical loads. The design allows for integration with factory belt drive accessories, which facilitates installation and limits the need for additional modifications.

Condition, verification, and service application

The offered item is used, making it an attractive cost-effective alternative to new components while maintaining the functionality required for daily operation. This type of part is suitable for standard replacement of a worn alternator, as well as for post-accident repairs or restoring the efficiency of a fleet vehicle.

Selecting an alternator with the appropriate current capacity is crucial for battery life and the stability of electronic systems. A properly selected and functional alternator reduces the risk of voltage drops, starting problems, and errors in control modules.

Benefits of using an original Mini alternator

Using an original solution dedicated to the MINI Cooper One D R55/R56 allows for maintaining the factory operating parameters of the charging system. Proper fitment of mounts, electrical connections, and operating characteristics to the specific engine unit translates into electrical system stability and predictable vehicle behavior under various operating conditions.

Choosing a used OEM alternator is particularly beneficial when you want to maintain the vehicle's original specifications while optimizing repair costs. This solution is often preferred by workshops specializing in the Mini brand and users who consciously manage their service budget.

Expanding the Mini charging system

If you are planning a comprehensive repair or upgrade of the engine area in your Mini and need other elements from the same group, such as alternators with different capacities, power generators, or related belt drive components, check the available parts in the Mini alternators and generators category.

If you want to better understand why used original components for premium brands are gaining importance and how to reasonably plan repairs in the face of changes in the parts market, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.