BMW E87 116i N45N Rear Left N/S Spring Strut Leg Brake Calliper Suspension Hub

BMW E87 116i N45 Left Steering Knuckle 116HP is an original suspension component designed for the rear left side of the vehicle. Thanks to its factory geometry and precise fit for BMW construction, it ensures stable handling, predictable vehicle behavior, and proper cooperation with other suspension components. This is a solution for users who want to maintain consistent driving parameters and safe operation of the rear axle after repairing or replacing damaged parts.

Specifications and technical data

• SKU: 6774809-30
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774809
• Substitutable numbers: 3332677480933217561791332175476273421677637934216776377, 67748097561791754762767763796776377, 3332677480533326757079333267615813421676819334216768191, 67748056757079676158167681936768191, 34216855001, 6855001, 34216764647, 6764647, 33326774809, 6774809, 33326761581, 6761581, 33326774805, 6774805, 33326757079, 6757079
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and Function in the Suspension System

The left rear steering knuckle in a BMW 1 Series E87 with an N45 engine and 116 HP is a key structural element of the rear suspension. It is responsible for precise wheel guidance, maintaining the set geometry, and transferring loads between the hub, control arms, and the body. A correctly selected steering knuckle allows for:

• driving stability at higher speeds,
• even tire wear,
• proper cooperation with shock absorbers and springs,
• correct operation of safety systems such as ABS or traction control (depending on the car's equipment).

This component, from the Suspension Replacement Kits category, is particularly important after collisions, curb impacts, or when deformations of the rear axle are detected during a geometry measurement.

Compatibility and Mounting Parameters

The presented steering knuckle has been specifically designed for the rear left side of the BMW E87 116i N45 suspension, ensuring correct mounting points for control arms, the hub, and brake system mounting elements. By maintaining factory dimensions and hole spacing, installation is possible without structural modifications, using standard bolts and bushings specified by the manufacturer.

Its placement on the vehicle as rear – left side eliminates the risk of errors in part selection and facilitates the mechanic's work. After installation, a full geometry measurement and adjustment are recommended to fully utilize the suspension's potential and restore the car's original driving characteristics.

Characteristics of a Used Part

The steering knuckle is a used part, meaning it is a pre-owned component retaining its original BMW construction. Such components are often chosen for post-accident repairs and for optimizing service costs, as they combine factory fit with a more favorable price compared to new parts. A used steering knuckle, when properly assessed by the seller and mechanic, can continue to provide stable and predictable suspension performance for a long time.

An additional advantage is the reduced environmental impact – the use of salvaged parts aligns with the concept of material reuse and minimizing automotive waste.

Practical Installation and Maintenance Tips

When replacing the left rear steering knuckle in a BMW E87, it is advisable to simultaneously check the condition of other suspension components: control arms, bushings, wheel bearings, and shock absorber mounts. This helps avoid repeated disassembly in a short period and restores the cohesive operation of the entire axle. After installation, it is recommended to:

• thoroughly clean contact surfaces and threads,
• apply correct tightening torques according to BMW service data,
• verify wheel play after assembling the system,
• check geometry and, if necessary, adjust toe and camber angles.

To maximize the lifespan of used suspension components, regular inspections and prompt attention to the first signs of wear, such as knocking noises, pulling to one side, or uneven tire wear, are recommended. Practical advice on maintenance and operation can be found in the article How to Extend the Lifespan of Used Car Parts?, which discusses, among other things, how to care for salvaged suspension parts.

Expanding Suspension Repairs in BMW

If you are planning a comprehensive repair or upgrade of the suspension area in your BMW and need other components from the same group, such as control arms, springs, or shock absorbers, check the available parts in the BMW Suspension Replacement Kits category.

A well-chosen set of suspension components can restore consistent vehicle behavior, improve ride comfort, and increase the predictability of the car's reactions in emergency situations. Replacing several related elements simultaneously often shortens service time and reduces the risk of subsequent, additional repairs.