BMW i3 I01 Hybrid Electric Brake Booster Servo Unit Master Cylinder 6799928

The BMW i3 I01 Hybrid Electric Brake Booster Servo Unit Master Cylinder is an original brake system component designed for BMW i3 I01 hybrid-electric models. This brake booster and master cylinder assembly ensures stable braking assistance, precise pressure regulation, and consistent operation with energy recovery systems, contributing to safe and predictable brake performance in daily use.

Specifications and technical data

• SKU: rhd-6799928
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6799928
• Substitutable numbers: 34336858912, 6858912, 34336858915, 6858915, 34336858913, 6858913, 6799928
• Category: Brake Servos

Purpose and Function in the BMW i3 I01 Brake System

The described brake booster and master cylinder assembly is a key module responsible for assisting the force applied to the brake pedal and generating adequate pressure in the hydraulic circuits. In electric and hybrid vehicles like the BMW i3 I01, this component works in conjunction with recuperation systems, making its proper functioning directly impact:

• braking force stability and repeatability under various road conditions,
• smooth transitions between regenerative and hydraulic braking,
• brake pedal comfort and driver feedback from the system.

Construction of the Brake Booster and Master Cylinder Assembly

The presented component combines the brake booster and the master cylinder in a single housing, creating a compact module tailored to the BMW i3 I01 architecture. The OEM construction ensures:

• factory mounting points to the body and pedal system,
• manufacturer-designed hydraulic channels and line connections,
• appropriate boost characteristics adjusted to the weight and load distribution of the electric vehicle.

This allows for an organized installation, and after proper adaptation, the braking system regains near-factory performance.

Benefits of Using an Original Brake Booster and Force Regulator

Choosing an original module from the Brake Boosters and Force Regulators category for the BMW i3 I01 helps maintain the integrity of the entire braking system. In practice, this means:

• preserving the factory brake pedal operating characteristics,
• correct interaction with ABS/ESP control electronics and energy recovery systems,
• reducing the risk of incorrect brake force distribution between axles.

This type of component directly affects safety, making the use of an original BMW part particularly important in vehicles with advanced electrical architectures.

Characteristics of a Used Part and Installation Aspects

The offered brake booster and master cylinder assembly is a used part, sourced from a dismantled BMW vehicle. This type of OEM component offers an attractive cost-effective alternative to new replacements while maintaining a construction consistent with the manufacturer's design. Before installation, a standard workshop procedure is recommended, including system leak checks, bleeding, and verification of correct operation in conjunction with the vehicle's electronics.

If you are considering the choice between new and used brake system components, the article: Comparison of Costs and Quality of New and Used Car Parts, which discusses the differences between used OEM parts and new replacements, may be helpful.

Why Choose an Original BMW Module for the i3 I01

Using an original brake booster and master cylinder assembly in the BMW i3 I01 allows for braking performance to be maintained at the level intended by the manufacturer, without the need for installation modifications or software interventions beyond standard service adaptation. This solution is particularly beneficial for users who expect:

• consistency with other components of the BMW braking system,
• preservation of factory safety system settings,
• a reasonable compromise between cost and quality through the use of a used OEM part.

For a broader perspective on operation and component selection in vehicles, we also encourage you to read the article How to Select and Service OEM Components for Year-Round Comfort and Safety, which describes practical procedures and service recommendations when working with original parts.