BMW E90 E91 Front Brake Caliper Housing 57/24 Right O/S 6778146

BMW E90 E91 Front Brake Caliper Housing 57/24 Right O/S is an original brake system component from the Brake calipers and carriers group, designed for installation on the front right axle. This used brake caliper provides a functional service solution for drivers who expect factory-fitment, predictable brake system performance, and reasonable maintenance costs. Thanks to the preservation of the specific piston and housing design, it ensures stable brake pad guidance and consistent performance during braking.

Specifications and technical data

• SKU: 6778146
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6778146
• Substitutable numbers: 6778146, 34116778146
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and BMW compatibility

The presented caliper has been designed specifically for the front right side of the axle in selected BMW 3 Series E90/E91 models. This ensures the correct mounting geometry, appropriate bolt spacing, and compatibility with factory brake discs and pads intended for this configuration. Such fitment reduces the risk of installation issues and allows for the maintenance of the brake system's original operating parameters.

Because this is a genuine BMW component, consistency with the factory braking force characteristics is maintained, which is important both for braking efficiency and for proper interaction with assistance systems such as ABS or traction control.

Construction and technical characteristics

The front right caliper in this configuration utilizes a piston layout matched to the front axle load of the BMW E90/E91. The housing design ensures even pressure of the pads against the disc, which translates into stable, predictable braking and reduced uneven wear of the friction linings. Properly shaped guides and mounting sockets facilitate servicing, pad replacement, and operational condition checks.

This solution is designed to operate in demanding thermal conditions – the caliper must withstand high heat loads generated during intensive braking while maintaining the tightness of the hydraulic system and stable piston operation.

Practical application and installation benefits

Choosing a used brake caliper for a BMW allows for maintaining the factory brake system configuration without the need for aftermarket replacements with uncertain specifications. This solution is particularly beneficial for:

• repairs following one-sided wear or seizure of a front axle caliper,
• restoring the efficiency of the brake system after the vehicle has been stationary for a long period,
• servicing vehicles used intensively in urban traffic.

A properly selected front right caliper helps maintain the balance of braking force between the left and right sides, which affects vehicle stability during emergency braking and the even wear of pads and discs.

Installation zone – front right side

The placement on the vehicle in the front right zone means that this component operates in the most heavily loaded part of the brake system. The front axle handles a significant portion of the braking force, which is why the correct choice of caliper has a direct impact on driving safety. Using a component that is structurally compliant with the original BMW design minimizes the risk of system malfunctions, such as the vehicle pulling to one side during braking or uneven disc heating.

Integration with other brake system components

The brake caliper works directly with the disc, pads, brake lines, and the master cylinder. The proper operation of this element is crucial for maintaining adequate pressure in the circuit and quick response to pressing the brake pedal. When replacing one caliper on an axle, it is worth paying attention to the condition of the remaining components to avoid differences in braking characteristics between the sides.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other elements from the same group, such as additional calipers, brackets, or guide pins, check the available parts in the BMW Brake calipers and carriers category.

Safe selection of a used caliper

When choosing a used brake system component, it is worth paying attention to compatibility with the manufacturer's markings, body type, and engine version of the vehicle. It may be helpful to compare the caliper design with the component installed on the opposite side of the axle or consult a mechanic. To better prepare for the purchase and assessment of such components, it is worth using the practical tips included in the article Second-hand brake system: how to safely choose discs, calipers, and ABS?, where you will find a checklist useful when selecting used parts.

Summary

BMW E90 E91 Front Brake Caliper Housing 57/24 Right O/S is a used, original component from the Brake calipers and carriers group, intended for operation on the front right axle. It ensures factory fitment for the BMW E90/E91 design, supports stable brake system performance, and allows for an economical yet technically correct vehicle repair while maintaining the parameters specified by the manufacturer.