BMW 3 Series E90 330d N57 M57N2 Rear Left N/S Axle Leg Suspension Brake Disc Hub

Description

BMW 3 Series E90 330d N57 M57N2 Rear Left N/S Axle Leg Suspension Brake Disc Hub is a complete, used set of rear suspension and braking system components, designed for the left-hand drive axle. Combining the steering knuckle, axle shaft, and brake caliper into a single module facilitates maintenance, reduces repair time, and helps maintain the structural integrity of the entire wheel hub assembly.

Specifications and technical data

• SKU: 6774807-18
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774807
• Substitutable numbers: 33326774807, 6774807, 34216769101, 6769101, 33217533453, 7533453, 33217561789, 7561789, 34216855004, 6855004, 33326757735, 6757735, 34216764655, 6764655
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Set characteristics and purpose

The presented set from the Suspension replacement kits category includes key components of the rear left wheel hub assembly in the BMW 3 Series E90 with the N57 engine. The set integrates elements responsible for wheel guidance, power transmission, and braking system operation, which is particularly important for major repairs following a collision, replacing corroded parts, or restoring factory suspension geometry.

The placement on the vehicle is the rear axle on the left side, which eliminates the risk of error when selecting the component and facilitates workshop planning.

Construction and function of individual elements

The set includes a rear steering knuckle, which serves as the mounting base for the hub, suspension components, and brake caliper. Its task is to provide stable wheel guidance in the axis, maintain proper geometry, and transfer loads from the control arms to the body. The integrated axle shaft is responsible for transmitting torque from the final drive to the wheel, ensuring smooth power delivery while the suspension operates through its full range of travel.

The brake caliper in this set works with the rear brake disc, generating the braking force necessary for safe deceleration. Combining these elements into one module allows for maintaining the correct relative position of the components, which is significant for even tire wear, vehicle stability, and braking efficiency.

Benefits of using a complete set

Using a complete rear left wheel hub assembly set instead of replacing individual components is particularly beneficial in situations where:

• mechanical damage to several components has occurred simultaneously,
• there is a suspicion of a bent steering knuckle or excessive wear of the mounts,
• it is necessary to quickly restore the vehicle’s functionality with limited downtime,
• consistency of parts sourced from a single vehicle is important.

Such a solution also facilitates subsequent geometry adjustment, as the elements are factory-matched to each other, and the risk of dimensional discrepancies between different manufacturers is limited.

Original BMW origin and used condition

The set comes from the BMW brand, which means maintaining factory design parameters, correct mounting offsets, and compatibility with standard suspension and brake components in the E90 330d N57 model. Original components of this type are particularly valued in premium-class cars, where steering precision and predictable chassis behavior have a direct impact on safety and driving comfort.

The used condition allows for an economical repair while maintaining the quality characteristic of factory-installed parts. This is a solution often chosen by workshops specializing in BMW that are looking for a reasonable compromise between cost and performance parameters.

Selection, compatibility, and technical support

Before purchasing, it is worth verifying the compatibility of the set with the specific version of the BMW E90 330d N57, taking into account the body type and drivetrain configuration. Manufacturer markings, OEM part numbers, and interchangeable numbers are helpful in this regard, allowing for precise matching of the component to the specific vehicle. This minimizes the risk of incorrect installation and additional costs.

If you are planning a comprehensive repair or upgrade of the rear suspension zone in your BMW and need other elements from the same group, such as control arms, hubs, or additional mounts, check the available parts in the BMW suspension replacement kits category.

To better understand the differences between standard and sports chassis configurations and to make an informed decision on when it is worth choosing used suspension components, read the article: Standard vs. sports suspension – differences in construction and is it worth buying used suspension parts?