BMW 5 Series E60 LCI 525i N53 Rear Left N/S Suspension Leg Brake Caliper Disc

BMW 5 Series E60 LCI 525i N53 Rear Left N/S Suspension Leg Brake Caliper Disc is an original chassis component designed for the rear left side of the vehicle. Thanks to its factory geometry and perfect fit for the E60 LCI platform, it ensures stable handling, precise wheel alignment, and predictable vehicle behavior. This is the ideal solution for users seeking a proven, OEM-compliant suspension component rather than universal aftermarket replacements.

Specifications and technical data

• SKU: 6770905-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6770905
• Substitutable numbers: 33326770905, 6770905, 33326754557, 6754557, 34216758057, 6758057, 34216864061, 6864061, 33217547821, 7547821, 33207531574, 7531574, 33326754559, 6754559, 33326770831, 34216753215, 6753215, 34216772085, 6772085
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The rear steering knuckle in the BMW 5 Series E60 LCI 525i N53 Rear Left N/S Suspension Leg Brake Caliper Disc is responsible for a rigid yet precise connection between the wheel hub, control arms, and other suspension components. Its placement on the rear left side of the vehicle allows it to handle both longitudinal loads (acceleration, braking) and lateral loads (cornering), directly impacting driving stability and even tire wear.

A properly selected steering knuckle helps maintain factory geometry parameters, which is particularly important after collisions, intensive use, or during comprehensive component replacement in the Suspension Repair Kits category.

Compatibility and reference numbers

The presented item comes from the BMW parts family and complies with the OEM designations intended for the E60 LCI 525i platform. The steering knuckle has an assigned part number and a set of interchangeable numbers, which facilitates verification of compatibility with a specific vehicle configuration and comparison with other references used in this model.

This allows for the safe fitting of the component to the car, both during standard repairs and more extensive chassis upgrades, without the need for modifications or adaptations.

Characteristics of the used component

The steering knuckle comes from an operational vehicle, meaning it is a used part that retains the original design and parameters specified by the manufacturer. This type of component is a good choice in situations where the priority is to maintain factory handling characteristics while reducing repair costs.

Compared to cheap replacements, an original used steering knuckle allows for maintaining the structural integrity of the suspension, which translates into predictable vehicle reactions during braking, lane changes, or high-speed driving.

Practical service application

BMW 5 Series E60 LCI 525i N53 Rear Left N/S Suspension Leg Brake Caliper Disc will prove particularly useful in the following service scenarios:

• repair after mechanical damage to the rear wheel or suspension,
• restoring geometry after a collision or hitting a curb,
• comprehensive chassis renovation using elements from the Suspension Repair Kits category,
• economical replacement of worn components while maintaining original BMW specifications.

After installation, it is recommended to perform a professional wheel alignment to fully utilize the design potential and ensure even load distribution across all suspension components.

If you are planning a comprehensive repair or upgrade of the suspension area in your BMW and need other elements from the same group, such as control arms, bushings, or hubs, check out the available parts in the BMW Suspension Repair Kits category.

Why choose an original BMW steering knuckle

Choosing an original rear steering knuckle for the BMW 5 Series E60 LCI 525i N53 Rear Left N/S Suspension Leg Brake Caliper Disc primarily means preserving factory geometry and handling characteristics. A component designed by the vehicle manufacturer is matched to the weight, load distribution, and operation of other suspension parts, which minimizes the risk of unwanted vibrations and accelerated tire wear.

For users considering the wider use of used parts in their projects – both repair and tuning – practical tips on selecting and verifying components can be useful. In this context, it is worth reading the article Audi on second-hand parts – tuning and repairs without losing quality, which discusses the approach to used components in premium cars and shows how to combine savings with maintaining a high level of reliability.