Description
BMW E90 E91 E92 E93 Front Left N/S Brake Caliper Housing Carrier is an original brake system component from the Brake calipers and carriers group, designed for installation on the front left axle. This used carrier provides a solid base for refurbishing or replacing a worn caliper bracket, ensuring proper pad guidance and stable caliper mounting in BMW 3 Series E9x vehicles.
Specifications and technical data
- SKU: 6778145-4
- Mark: BMW (Genuine OE)
- Condition: Used
- OEM Part Number: 6778145
- Substitutable numbers: 34116778145, 6778145, 34116778147, 6778147, 57/24, 753
- Location on the vehicle: Front, Left
- Category: Calipers & Brackets
Purpose and function in the brake system
The brake caliper carrier is responsible for the precise positioning of the caliper relative to the disc and for the stable guidance of the brake pads. In the front left suspension of the BMW E90–E93 series, this component:
- maintains the caliper on the disc axis, which reduces uneven pad wear,
- ensures proper rigidity of the connection to the steering knuckle,
- enables correct operation of the guide pins and free movement of the caliper during braking.
As a result, the brake system maintains predictable performance characteristics, and braking force is better distributed across the vehicle’s front axle.
Compatibility and mounting parameters
The carrier has been designed specifically for the BMW 3 Series E90, E91, E92, and E93 platform, taking into account the front suspension geometry and factory caliper dimensions. The vehicle placement, defined as front – left side, minimizes the risk of errors when selecting parts and facilitates service planning.
The component is prepared for use with the factory 57/24 caliper, which allows for maintaining original braking characteristics and compatibility with standard discs and pads used in these models.
Benefits of using an original BMW carrier
Using an original carrier in the BMW E9x series provides a number of practical benefits:
- Factory geometry – maintaining the correct position of the caliper relative to the disc, without the need to modify other system components.
- Consistency with other components – perfect fit for standard guide pins, mounting bolts, and the caliper, which facilitates installation.
- Stable brake system operation – reduction of vibrations and unwanted play in the caliper mounting area.
The used OEM component is a good solution for maintenance repairs when it is crucial to maintain the original brake system design at reasonable service costs.
Component condition and service application
The carrier comes from dismantling and is offered as a used OEM component, which allows for cost-effective brake system repair in BMW E90, E91, E92, and E93 vehicles. This type of part is suitable both for replacing a damaged bracket after a collision and for comprehensive caliper refurbishment when it is necessary to replace a corroded or excessively worn carrier.
Before installation, standard service procedures are recommended, such as cleaning contact surfaces, checking threads, and verifying the condition of guide pins and mounting bolts to ensure the proper operation of the entire system.
Additional information and guide materials
If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other components from the same group, such as calipers, carriers, or brackets, check out the available parts in the BMW brake calipers and carriers category.
When selecting used brake system components, it is worth using reliable guide materials. Practical tips on the safe selection of discs, calipers, and ABS components can be found in the article “Second-hand brake system: how to safely choose discs, calipers, and ABS?”, which discusses the most important aspects of purchasing such parts step by step.
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