BMW 1 Series E87 LCI 120d N47 Rear Left N/S Suspension Leg Axle Brake Disc

BMW 1 Series E87 LCI 120d N47 Rear Left N/S Suspension Leg Axle Brake Disc is an original rear suspension component designed for the left-hand drive axle in the BMW 1 Series E87 model with the N47 engine. Thanks to its factory geometry and precise positioning on the vehicle, it ensures proper wheel guidance, driving stability, and correct interaction with the drivetrain. This solution is dedicated to users who expect precise fitment, compliance with factory standards, and hassle-free installation.

Specifications and technical data

• SKU: 6774809-12
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774809
• Substitutable numbers: 33326774809, 6774809, 34216768693, 6768693, 33217547075, 7547075, 33217533445, 7533445, 33326774805, 6774805, 33326757079, 6757079, 33326761581, 6761581, 34216764651, 6764651, 34216855007, 6855007
• Location on the vehicle: Rear, Left
• Category: Other Steering & Suspension Parts

Purpose and function in the suspension system

The steering knuckle with the axle shaft on the rear left side is responsible for the stable connection of the wheel hub to the suspension components and the transfer of torque from the drivetrain to the wheel. In the BMW E87 120d N47 177HP model, this component works with the rear suspension and drivetrain, influencing:

• maintaining the correct wheel geometry on the rear axle,
• control over the wheel position relative to the body during acceleration and braking,
• vehicle stability at higher speeds and during dynamic maneuvers,
• proper operation of the rear-wheel-drive system.

By maintaining factory mounting points, the steering knuckle with the axle shaft allows for precise restoration of suspension settings after a collision, repair, or replacement of worn components.

Compatibility and fitment for BMW E87 120d N47

The presented component has been designed specifically for the BMW 1 Series E87 with the 177 HP N47 unit, which translates into full compatibility with the factory rear axle construction. The appropriate positioning on the vehicle (rear, left side) eliminates the need for modifications, and the use of original mounting geometry facilitates installation in workshop conditions.

The rear left steering knuckle with the axle shaft is particularly important in vehicles that have suffered mechanical damage within the suspension or drivetrain area – its replacement allows for restoring stable handling and predictable vehicle behavior on the road.

Characteristics of the used component

The offered component comes from dismantling and is marked as used, which is a cost-effective solution for drivers looking for a factory part at a reasonable price. In the case of steering knuckles and axle shafts, using parts from original BMW production helps maintain the proper rigidity, fitment to other suspension elements, and compatibility with the drivetrain.

Choosing a used OEM component allows for reducing repair costs while maintaining the factory standard of workmanship and fitment, which is particularly important in higher-power cars such as the 120d N47 177HP.

Benefits of installing the rear left steering knuckle with axle shaft

Using the correct steering knuckle with the axle shaft on the rear left side in the BMW E87 120d N47 brings a number of practical benefits:

• restoration of the correct rear axle geometry after mechanical damage,
• increased driving confidence during highway driving and cornering,
• proper torque transfer to the left-side wheel,
• reduction of abnormal tire wear resulting from incorrect geometry,
• easier adjustment of toe and camber angles after suspension repair.

For workshops and individual users, this means the possibility of performing repairs in a technically correct manner, while maintaining stability, safety, and predictable vehicle behavior.

System expansion and related BMW components

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

For drivers interested in comparing technical solutions in sports versions of other brands, including chassis construction and braking systems, an article describing the differences between production models and high-performance versions may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.