BMW E46 Brake Caliper Front Left N/S Wheel Brake Unit Housing Z4 E85 54/22

BMW E46 Brake Caliper Front Left N/S Wheel Brake Unit Housing Z4 E85 is an original BMW braking system component designed for installation on the front left axle. Thanks to its factory design, it ensures proper cooperation with the brake disc and pads, stable pad guidance, and consistent braking force, which translates into safe and predictable braking system operation.

Specifications and technical data

• SKU: 6758113-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6758113
• Substitutable numbers: 34116758113, 6758113, 34111165029, 1165029, 34111160351, 1160351, 34106758104, 6758104, 34111163701, 1163701, BG
• Location on the vehicle: Front, Left
• Category: Calipers & Brackets

Purpose and fitment

The presented brake caliper is designed as a component to be mounted on the front, left side of the vehicle, in accordance with the manufacturer's factory specifications. The 54/22 construction type indicates a specific piston and carrier configuration, which is crucial for proper matching with the hub, brake disc, and brake pads in a given BMW model.

Its original BMW origin ensures proper fitment with the steering knuckle, brake line, and mounting elements, minimizing the risk of issues during installation and subsequent operation.

Caliper construction and function

The caliper from this series operates in a single-piston system, where force from the brake master cylinder is transferred through the brake line to the piston, which presses the pad against the disc. The second pad is guided by the carrier, ensuring even pad wear and stable braking.

Key design features of this type of caliper include:

• precise pad guidance in the carrier,
• appropriately selected piston diameter for the 54/22 system,
• compatibility with standard BMW brake lines,
• compatibility with factory brake discs and pads intended for this configuration.

This configuration allows for maintaining factory braking characteristics, which is particularly important when servicing the front axle in BMW E46 and Z4 E85 models.

Condition, verification, and service application

The item comes from the Brake calipers and housings category and is offered as a used part, which allows for cost-effective brake system repair while maintaining the original BMW design. This type of caliper is suitable both for standard replacement of a damaged component and for restoring system efficiency after a collision or intensive use.

Before installation, standard service procedures typical for brake calipers are recommended: checking the condition of working surfaces, guide pins, rubber boots, and potential replacement of consumables (seals, guide pin grease) in accordance with workshop procedures. A caliper prepared in this way can be safely integrated into the vehicle's existing braking system.

Benefits of using an original BMW caliper

Using an original caliper on the front left side in a BMW E46 or Z4 E85 allows for maintaining the consistency of the entire braking system. The main advantages include:

• factory fitment to the steering knuckle, disc, and pads specified by the manufacturer,
• consistent front axle braking characteristics,
• possibility of using the existing installation (lines, mounts) without modifications,
• easier diagnostics and service thanks to compliance with BMW documentation.

For workshops and users, this means predictable installation and reduced risk of compatibility issues that may occur with non-original parts.

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

Safe selection of a used brake caliper

When choosing a used caliper for a BMW, it is crucial to verify compatibility with the specific engine and body version and to check whether the 54/22 configuration matches the factory specifications for the given car. It is also worth paying attention to the condition of the working surfaces, threads, and brake line mounting points.

If you want to go through the process of safely selecting used braking system components, such as discs, calipers, or ABS components, step by step, the following guide will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?.