BMW 3 Z4 Series E46 E85 E85 Swing Support Front Left Right O/N/S 6780847

The BMW 3 / Z4 E46 E85 Front Control Arm Bracket is an original part from the Control Arms & Ball Joints group, designed for the front suspension on the left or right side. Designed by BMW, it ensures proper driving geometry, stable vehicle handling, and predictable behavior during braking and cornering.

Specifications and technical data

• SKU: 6780847
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6780847
• Substitutable numbers: 31356780847, 6780847
• Location on the vehicle: Front, Left, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Suspension

This bracket operates at a critical point of the front suspension, connecting components responsible for maintaining the correct wheel position relative to the body. Its placement on the vehicle covers the front left or right side, allowing for flexible application in repairs on both sides of the front axle.

A properly selected control arm bracket helps maintain:

• stable wheel alignment (toe) and camber angles,
• precise handling at higher speeds,
• even tire wear and predictable steering responses.

Compatibility with BMW 3 Series E46 and Z4 E85

This part has been specifically developed for BMW 3 Series E46 and BMW Z4 E85 models, ensuring it retains factory mounting points and proper structural rigidity. Using a part from the same design family as the original minimizes the risk of geometry issues, play, or unwanted body vibrations.

The bracket is particularly recommended for:

• replacing worn or damaged suspension components after a collision or intensive use,
• restoring original driving characteristics after suspension modifications,
• comprehensive front axle refurbishment in daily-driven BMW cars.

Characteristics of the Used Part

This product is a used part, sourced from disassembly, offering a cost-effective solution while maintaining the original BMW specifications. Compared to low-quality aftermarket alternatives, the original control arm bracket offers precise fitment to the body and predictable behavior under load.

Before installation, a standard inspection of the mounting surfaces, sockets, and contact points with other suspension components is recommended. After installation, a professional wheel alignment should be performed.

Importance for Driving Safety and Comfort

A correctly selected control arm bracket directly impacts driving safety and comfort. A stable connection of suspension components limits uncontrolled wheel movements, improves traction, and reduces the risk of losing grip on uneven surfaces.

To better understand the role of such components in the entire drivetrain, it is worth reading the guide describing the operation of shock absorbers, control arms, and stabilizers – you can find it in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers.

Expanding Suspension Repairs for BMW

If you are planning a comprehensive repair or upgrade of the front suspension area in your BMW and require other parts from the same group, such as additional brackets, mounting elements, or ball joints, check the available parts in the BMW Control Arms & Ball Joints category.